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Danfoss VLT Refrigeration Drive FC-103P90KT4 [100/138] Force write multiple coils 0f hex
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Query
The query message specifies the coil 65 (parameter write
control) to be forced. Coil addresses start at zero, i.e. coil
65 is addressed as 64. Force Data = 00 00HEX (OFF) or FF
00HEX (ON).
Field Name Example (HEX)
Slave Address 01 (Frequency converter address)
Function 05 (write single coil)
Coil Address HI 00
Coil Address LO 40 (64 decimal) Coil 65
Force Data HI FF
Force Data LO 00 (FF 00 = ON)
Error Check (CRC) -
Table 7.24
Response
The normal response is an echo of the query, returned
after the coil state has been forced.
Field Name Example (HEX)
Slave Address 01
Function 05
Force Data HI FF
Force Data LO 00
Quantity of Coils HI 00
Quantity of Coils LO 01
Error Check (CRC) -
Table 7.25
7.8.3 Force/Write Multiple Coils (0F HEX)
This function forces each coil in a sequence of coils to
either ON or OFF. When broadcast the function forces the
same coil references in all attached slaves.
The query message specifies the coils 17 to 32 (speed set-
point) to be forced.
Field Name Example (HEX)
Slave Address 01 (frequency converter address)
Function 0F (write multiple coils)
Coil Address HI 00
Coil Address LO 10 (coil address 17)
Quantity of Coils HI 00
Quantity of Coils LO 10 (16 coils)
Byte Count 02
Force Data HI
(Coils 8-1)
20
Force Data LO
(Coils 16-9)
00 (ref. = 2000 hex)
Error Check (CRC) -
Table 7.26
Response
The normal response returns the slave address, function
code, starting address, and quantity of coils forced.
Field Name Example (HEX)
Slave Address 01 (frequency converter address)
Function 0F (write multiple coils)
Coil Address HI 00
Coil Address LO 10 (coil address 17)
Quantity of Coils HI 00
Quantity of Coils LO 10 (16 coils)
Error Check (CRC) -
Table 7.27
7.8.4 Read Holding Registers (03 HEX)
Description
This function reads the contents of holding registers in the
slave.
Query
The query message specifies the starting register and
quantity of registers to be read. Register addresses start at
zero, i.e. registers 1-4 are addressed as 0-3.
Example: Read 3-03 Maximum Reference, register 03030.
Field Name Example (HEX)
Slave Address 01
Function 03 (read holding registers)
Starting Address HI 0B (Register address 3029)
Starting Address LO D5 (Register address 3029)
No. of Points HI 00
No. of Points LO 02 - (Par. 3-03 is 32 bits long, i.e.
2 registers)
Error Check (CRC) -
Table 7.28
RS-485 Installation and Set...
VLT
®
Refrigeration Drive Design Guide
MG16G102 - VLT
®
is a registered Danfoss trademark 99
7
7
Содержание
- Design guide 1
- Mg16g102 1
- Refrigeration drive 1
- Aggressive environments 2
- Air humidity 2
- Ce labelling 2
- Contents 2
- Control structures 2
- Drive selection 2
- Earth leakage current 2
- Extreme running conditions 2
- Galvanic isolation pelv 2
- General aspects of emc 2
- How to install 2
- How to order 2
- How to read this design guide 2
- Introduction 2
- Mechanical installation 2
- Options and accessories 2
- Ordering form 2
- Ordering numbers 2
- Safe stop 2
- Vibration and shock 2
- Additional connections 3
- Application examples 3
- Electrical installation 3
- Emc correct installation 3
- Fc protocol message framing structure 3
- Fc protocol overview 3
- Final set up and test 3
- Installation of misc connections 3
- Rs 485 installation and set up 3
- Safety 3
- Alarm and status messages 4
- Efficiency 4
- Examples 4
- Fc control profile 4
- General specifications 4
- General specifications and troubleshooting 4
- How to access parameters 4
- Modbus rtu message framing structure 4
- Modbus rtu overview 4
- Special conditions 4
- Approvals certificates 6
- Available literature for vl 6
- Caution 6
- How to read this design guide 6
- Legal information 6
- Refrigeration drive fc 103 6
- Software version and approvals vl 6
- Symbols 6
- Warning 6
- Abbreviations 7
- Definitions 7
- How to read this design gui vlt 7
- Indicates highlighted information that should be regarded with attention to avoid mistakes or operate equipment at less than optimal performance 7
- Refrigeration drive design guide 7
- The maximum motor frequency 7
- The maximum output current 7
- The maximum output voltage 7
- The minimum motor frequency 7
- The motor current 7
- The motor frequency 7
- The motor frequency when the jog function is activated via digital terminals 7
- The rated motor current nameplate data 7
- The rated motor frequency nameplate data 7
- The rated motor speed nameplate data 7
- The rated output current supplied by the frequency converter 7
- Power factor 10
- Caution 11
- Introduction 11
- Safety 11
- Safety note 11
- Warning 11
- Caution 12
- Ce conformity and labelling 12
- Ce labelling 12
- What is covered 12
- Aggressive environments 13
- Air humidity 13
- Caution 13
- Compliance with emc directive 2004 108 ec 13
- Danfoss frequency converter and ce labelling 13
- Warning 14
- Introduction vlt 15
- Refrigeration drive design guide 15
- Safe stop installation 16
- Introduction vlt 17
- Refrigeration drive design guide 17
- A frequency converter takes advantage of the fact that centrifugal fans and pumps follow the laws of propor tionality for such fans and pumps for further information see the text and figure the laws of proportionality 18
- Advantages 18
- As can be seen from the figure the laws of propor tionality the flow is controlled by changing the rpm by reducing the speed only 20 from the rated speed the flow is also reduced by 20 this is because the flow is directly proportional to the rpm the consumption of electricity however is reduced by 50 if the system in question only needs to be able to supply a flow that corresponds to 100 a few days in a year while the average is below 80 of the rated flow for the remainder of the year the amount of energy saved is even more than 50 18
- Example of energy savings 18
- Introduction vlt 18
- Refrigeration drive design guide 18
- The clear advantage energy savings 18
- The very clear advantage of using a frequency converter for controlling the speed of fans or pumps lies in the electricity savings when comparing with alternative control systems and technologies a frequency converter is the optimum energy control system for controlling fan and pump systems 18
- Why use a frequency converter for controlling fans and pumps 18
- Comparison of energy savings 19
- Example with varying flow over 1 year 19
- As illustrated in the figure below a frequency converter does not consume more than rated current 20
- Better control 20
- Cos φ compensation 20
- Frequency converter in this example it is less than a year when compared with valves and constant speed 20
- Generally speaking the vl 20
- If a frequency converter is used for controlling the flow or pressure of a system improved control is obtained a frequency converter can vary the speed of the fan or pump thereby obtaining variable control of flow and pressure furthermore a frequency converter can quickly adapt the speed of the fan or pump to new flow or pressure conditions in the system simple control of process flow level or pressure utilizing the built in pid control 20
- Introduction vlt 20
- Refrigeration drive design guide 20
- Refrigeration drive fcr 103 has a cos φ of 1 and provides power factor correction for the cos φ of the motor which means that there is no need to make allowance for the cos φ of the motor when sizing the power factor correction unit 20
- Star delta starter or soft starter not required 20
- When larger motors are started it is necessary in many countries to use equipment that limits the start up current in more traditional systems a star delta starter or soft starter is widely used such motor starters are not required if a frequency converter is used 20
- Control principle 21
- Control structure open loop 21
- Control structures 21
- Local hand on and remote auto on control 21
- Control structure closed loop 22
- Feedback conversion 23
- Feedback handling 23
- Reference handling 24
- Example of closed loop pid control 25
- Programming order 25
- General aspects of emc 26
- General aspects of emc emissions 26
- Manual pid adjustment 26
- Tuning the drive closed loop controller 26
- According to the emc product standard for adjustable speed frequency converters en iec 61800 3 2004 the emc requirements depend on the intended use of the frequency converter four categories are defined in the emc product standard the definitions of the 4 categories together with the requirements for mains supply voltage conducted emissions are given in table 2 27
- Emission requirements 27
- If the screen is to be placed on a mounting plate for the frequency converter the mounting plate must be made of metal because the screen currents have to be conveyed back to the unit moreover ensure good electrical contact from the mounting plate through the mounting screws to the frequency converter chassis 27
- In order to reduce the interference level from the entire system unit installation make motor and brake cables as short as possible avoid placing cables with a sensitive signal level alongside motor and brake cables radio interference higher than 50 mhz airborne is especially generated by the control electronics see for more information on emc 27
- Introduction vlt 27
- Refrigeration drive design guide 27
- When the generic emission standards are used the frequency converters are required to comply with the following limits 27
- When unscreened cables are used some emission requirements are not complied with although the immunity requirements are observed 27
- Will be necessary to break the screen to avoid current loops 27
- Introduction vlt 28
- Refrigeration drive design guide 28
- A frequency converter takes up a non sinusoidal current from mains which increases the input current 29
- A non sinusoidal current is transformed by means of a fourier analysis and split up into sine wave currents with different frequencies i e different harmonic currents 29
- Emc test results emission 29
- General aspects of harmonics emission 29
- Industrial environment housing trades and light industries 29
- Introduction vlt 29
- Potentiometer as well as a motor and motor screened cable 29
- Refrigeration drive design guide 29
- Rfi filter type conducted emission maximum shielded cable length radiated emission 29
- Standard en 55011 class a2 en 55011 class a1 en 55011 class b en 55011 class a1 en 55011 class b 29
- The following test results have been obtained using a system with a frequency converter with options if relevant a screeened control cable a control box with 29
- The harmonics do not affect the power consumption directly but increase the heat losses in the installation transformer cables consequently in plants with a high percentage of rectifier load maintain harmonic currents at a low level to avoid overload of the transformer and high temperature in the cables 29
- With 50 hz as the basic frequency 29
- Harmonics emission requirements 30
- Harmonics test results emission 30
- Immunity requirements 30
- Basic standard burst iec 61000 4 4 surge iec 61000 4 5 esd iec 61000 4 2 31
- Introduction vlt 31
- Radiated electromagnetic field iec 61000 4 3 31
- Refrigeration drive design guide 31
- Rf common mode voltage iec 61000 4 6 acceptance criterion b b b a a voltage range 200 240 v 380 480 v 31
- All control terminals and relay terminals 01 03 04 06 comply with pelv protective extra low voltage with the exception of grounded delta leg above 400 v 32
- Current transducers 32
- Emc test results emission 32
- Galvanic ensured isolation is obtained by fulfilling requirements for higher isolation and by providing the relevant creepage clearance distances these requirements are described in the en 61800 5 1 standard 32
- Galvanic isolation pelv 32
- Gate drive that runs the igbts trigger transformers opto couplers 32
- In order to maintain pelv all connections made to the control terminals must be pelv e g thermistor must be reinforced double insulated 32
- Indicating the voltage of intermediate dc link circuit 32
- Industrial environment housing trades and light industries 32
- Introduction vlt 32
- Pelv offers protection by way of extra low voltage protection against electric shock is ensured when the electrical supply is of the pelv type and the installation is made as described in local national regulations on pelv supplies 32
- Pelv protective extra low voltage 32
- Potentiometer as well as a motor and motor screened cable 32
- Power supply smps incl signal isolation of 32
- Refrigeration drive design guide 32
- Rfi filter type conducted emission maximum shielded cable length radiated emission 32
- Standard en 55011 class a2 en 55011 class a1 en 55011 class b en 55011 class a1 en 55011 class b 32
- The components that make up the electrical isolation as described below also comply with the requirements for higher isolation and the relevant test as described in en 61800 5 1 the pelv galvanic isolation can be shown in six locations see illustration 2 2 32
- The following test results have been obtained using a system with a frequency converter with options if relevant a screeened control cable a control box with 32
- Warning 33
- Extreme running conditions 34
- Warning 34
- Motor thermal protection 35
- Drive selection 37
- General purpose input output module mcb 101 37
- Mounting of option modules in slot b 37
- Options and accessories 37
- Analog voltage inputs terminal x30 10 12 38
- Digital inputs terminal x30 1 4 38
- Drive selection vlt 38
- Galvanic isolation in the mcb 101 digital analog inputs are galvanically isolated from other inputs outputs on the mcb 101 and in the control card of the frequency converter digital analog outputs in the mcb 101 are galvanically isolated from other inputs outputs on the mcb 101 but not from these on the control card of the frequency converter 38
- If the digital inputs 7 8 or 9 are to be switched by use of the internal 24 v power supply terminal 9 the connection between terminal 1 and 5 which is shown in illustration 3 has to be established 38
- Refrigeration drive design guide 38
- Analog outputs terminal x30 5 8 39
- Cable strips for fastening cables to relay module 39
- Digital outputs terminal x30 5 7 39
- Drive selection vlt 39
- Electrical data max terminal load ac 1 39
- Extended lcp frame and enlarged terminal cover 39
- Inductive load 24 v dc 0 a 39
- Inductive load cosφ 0 240 v ac 0 a 39
- Label for covering access to switches s201 s202 and s801 39
- Max switching rate at rated load min load 6 mi 39
- Max terminal load ac 15 39
- Max terminal load dc 1 39
- Max terminal load dc 13 39
- Min terminal load dc 5 v 10 ma 39
- Refrigeration drive design guide 39
- Relay module mcb 105 39
- Relay option mcb 105 39
- Resistive load 24 v dc 1 a 39
- Resistive load 240 v ac 2a 39
- The mcb 105 option includes 3 pieces of spdt contacts and must be fitted into option slot b 39
- When the relay option kit is ordered separately the kit includes 39
- Drive selection vlt 40
- Refrigeration drive design guide 40
- Warning 41
- V back up option mcb 107 option d 42
- Warning 42
- Analog i o option mcb 109 43
- Cabling 45
- How to install option in frequency converter 45
- Maximum cable lengths 45
- The lonworks option 45
- Drive selection vlt 47
- Refrigeration drive design guide 47
- The lcp can be moved to the front of a cabinet by using the remote built in kit the enclosure is the ip66 the fastening screws must be tightened with a torque of max 1nm 47
- Ip21 ip41 type 1 enclosure kit 48
- Drive selection vlt 49
- Ip 21 type 1 enclosure kit 49
- Place the top cover as shown if an a or b option is used the brim must be fitted to cover the top inlet place the base part c at the bottom of the frequency converter and use the clamps from the accessory bag to correctly fasten the cables holes for cable glands size a2 2x m25 and 3xm32 size a3 3xm25 and 3xm32 49
- Refrigeration drive design guide 49
- Drive selection vlt 50
- Refrigeration drive design guide 50
- Side by side installation is not possible when using the ip 21 ip 4x type 1 enclosure kit 50
- Output filters 51
- Description pos possible choice 52
- Drive configurator 52
- Example of drive configurator interface set up the numbers shown in the boxes refer to the letter figure number of the type code string read from left to right 52
- Fc 103 102p18kt4e21h1xgcxxxsxxxxagbkcxxxxdx 52
- From the internet based drive configurator you can configure the right frequency converter for the right application and generate the type code string the drive configurator will automatically generate an eight digit sales number to be delivered to your local sales office furthermore you can establish a project list with several products and send it to a danfoss sales representative 52
- How to order 52
- How to order vlt 52
- It is possible to design a frequency converter according to the application requirements by using the ordering number system 52
- Order the frequency converter as either standard or with integral options by sending a type code string describing the product a to the local danfoss sales office i e 52
- Ordering form 52
- Ordering numbers for frequency converter standard variants can also be located in 4 how to order 52
- Refrigeration drive design guide 52
- The drive configurator can be found on the global internet site www danfoss com drives 52
- The meaning of the characters in the string can be located in the pages containing the ordering numbers in 3 drive selection in the example above a akd lonworks option and a general purpose i o option is included in the frequency converter 52
- Type code string 52
- Description pos possible choice 53
- How to order vlt 53
- Refrigeration drive design guide 53
- How to order vlt 54
- Options can be ordered as factory built in options see ordering information 54
- Ordering numbers 54
- Ordering numbers options and accessories 54
- Refrigeration drive design guide 54
- Type description ordering no miscellaneous hardware i 54
- How to order vlt 55
- Refrigeration drive design guide 55
- Be aware that only vlt refrigeration drives running sw v 1 x or above support the use of ahf and swf filters du dt filters are supported and can be used on any software version 56
- For ordering numbers for du dt filters see output filter design guide mg90n 56
- For ordering numbers see ahf 005 010 design guide mg80c 56
- Harmonic filters are used to reduce mains harmonics 56
- How to order vlt 56
- Ordering numbers du dt filters 56
- Ordering numbers harmonic filters 56
- Ordering numbers sine wave filter modules 200 500 v ac 56
- Refrigeration drive design guide 56
- See also output filter design guide mg90n 56
- When using sine wave filters the switching frequency should comply with filter specifications in 14 01 switching frequency 56
- How to install 57
- How to install vlt 57
- Mechanical front views 57
- Mechanical installation 57
- Refrigeration drive design guide 57
- How to install vlt 58
- Mechanical dimensions 58
- Refrigeration drive design guide 58
- How to install vlt 59
- Refrigeration drive design guide 59
- Accessory bags 60
- How to install vlt 60
- Refrigeration drive design guide 60
- All a b and c enclosures allow side by side installation exception if a ip21 kit is used there has to be a clearance between the enclosures for enclosures a2 a3 a4 b3 b4 and c3 the minimum clearance is 50 mm for c4 it is 75 mm 61
- Drill holes in accordance with the measurements given 61
- For optimal cooling conditions allow a free air passage above and below the frequency converter see table 5 61
- How to install vlt 61
- Mechanical mounting 61
- Provide screws suitable for the surface on which you want to mount the frequency converter retighten all four screws 61
- Refrigeration drive design guide 61
- When mounting enclosure sizes a4 a5 b1 b2 b3 b4 c1 c2 c3 and c4 on a non solid back wall the frequency converter must be provided with a back plate a due to insufficient cooling air over the heat sink 61
- Caution 62
- Field mounting 62
- Lifting 62
- Safety requirements of mechanical installation 62
- Warning 62
- Cables general 63
- Cables general all cabling must comply with national and local regulations on cable cross sections and ambient temperature copper 60 75 c conductors are recommended 63
- Electrical installation 63
- For the vl 63
- How to install vlt 63
- Refrigeration drive 110 250 kw mg16f 63
- Refrigeration drive design guide 63
- Refrigeration drive fcr 103 high power series mains and motor connections see vl 63
- Electrical installation and control cables 64
- How to install vlt 64
- Refrigeration drive design guide 64
- Electrical installation of motor cables 65
- Motor cables 65
- Enclosure knock outs 66
- Removal of knockouts for extra cables 66
- Gland conduit entry ip21 nema 1 and ip54 nema12 67
- Warning 68
- Control cable terminals 69
- Control terminals 69
- Basic wiring example 70
- Electrical installation control cables 71
- Final set up and test 72
- Switches s201 s202 and s801 72
- Additional connections 74
- External fan supply 74
- Mains disconnectors 74
- Parallel connection of motors 74
- Relay output 74
- Direction of motor rotation 75
- Motor thermal protection 75
- Installation of misc connections 76
- Motor bearing currents 76
- Motor insulation 76
- Rs 485 bus connection 76
- How to connect a pc to the frequency converter 77
- Electrical installation emc precautions 78
- Emc correct installation 78
- High voltage test 78
- Mct 31 78
- Safety 78
- Safety earth connection 78
- Warning 78
- Use of emc correct cables 80
- Earthing of screened armoured control cables 81
- Application examples 83
- Pulse start stop 83
- Start stop 83
- Automatic motor adaptation ama 84
- Potentiometer reference 84
- Smart logic control 84
- Smart logic control programming 84
- Slc application example 85
- Network connection 87
- Overview 87
- Rs 485 installation and set up 87
- Emc precautions 88
- Fc protocol overview 88
- Frequency converter hardware setup 88
- Frequency converter parameter settings for modbus communication 88
- Refrigeration drive design guide 88
- Relevant national and local regulations for example regarding protective earth connection must be observed 88
- Rs 485 installation and set vlt 88
- The factory setting for the dip switch is off 88
- The fc protocol also referred to as fc bus or standard bus is the danfoss standard fieldbus it defines an access technique according to the master slave principle for communications via a serial bus one master and a maximum of 126 slaves can be connected to the bus the master selects the individual slaves via an address character in the telegram a slave itself can never transmit without first being requested to do so and direct message transfer between the individual slaves is not possible communications occur in the half duplex mode the master function cannot be transferred to another node single master system 88
- The following emc precautions are recommended in order to achieve interference free operation of the rs 485 network 88
- The following parameters apply to the rs 485 interface fc port 88
- The physical layer is rs 485 thus utilizing the rs 485 port built into the frequency converter the fc protocol supports different telegram formats 88
- The rs 485 communication cable must be kept away from motor and brake resistor cables to avoid coupling of high frequency noise from one cable to another normally a distance of 200 mm 8 inches is sufficient but keeping the greatest possible distance between the cables is generally recommended especially where cables run in parallel over long distances when crossing is unavoidable the rs 485 cable must cross motor and brake resistor cables at an angle of 90 88
- Use the terminator dip switch on the main control board of the frequency converter to terminate the rs 485 bus 88
- Content of a character byte 89
- Data control byte bcc 89
- Fc protocol message framing structure 89
- Frequency converter address adr 89
- Frequency converter set up 89
- Telegram length lge 89
- Telegram structure 89
- The data field 90
- The pke field 90
- Bits no 0 11 transfer parameter numbers the function of the relevant parameter is defined in the parameter description in 91
- Bits no 12 15 transfer parameter commands from master to slave and return processed slave responses to the master 91
- If the command cannot be performed the slave sends this response 0111 command cannot be performed and issues the following fault report in the parameter value pwe 91
- Index ind 91
- Only the low byte is used as an index 91
- Parameter number pnu 91
- Parameter value pwe 91
- Pwe low hex fault report 91
- Refrigeration drive design guide 91
- Rs 485 installation and set vlt 91
- The index is used together with the parameter number to read write access parameters with an index e g 15 30 alarm log error code the index consists of 2 bytes a low byte and a high byte 91
- The parameter value block consists of 2 words 4 bytes and the value depends on the defined command ak the master prompts for a parameter value when the pwe block contains no value to change a parameter value write write the new value in the pwe block and send from the master to the slave 91
- When a slave responds to a parameter request read command the present parameter value in the pwe block is transferred and returned to the master if a parameter contains not a numerical value but several data options e g 0 01 language where 0 corresponds to english and 4 corresponds to danish select the data value by entering the value in the pwe block see example selecting a data value serial communication is only capable of reading parameters containing data type 9 text string 91
- 12 motor speed low limit hz has a conversion factor of 0 to preset the minimum frequency to 10 hz transfer 92
- 40 fc type to 15 53 power card serial number contain data type 9 for example read the unit size and mains voltage range in 15 40 fc type when a text string is transferred read the length of the telegram is variable and the texts are of different lengths the telegram length is defined in the second byte of the telegram lge when using text transfer the index character indicates whether it is a read or a write command 92
- Change 4 14 motor speed high limit hz to 100 hz write the data in eeprom 92
- Conversion 92
- Data types supported by the frequency converter 92
- Examples 92
- Examples 0s conversion index 0 0 0s conversion index 2 0ms conversion index 3 0 0ms conversion index 5 92
- Pke e19e hex write single word in 4 14 motor speed high limit hz 92
- Process words pcd 92
- Refrigeration drive design guide 92
- Rs 485 installation and set vlt 92
- Some parameters contain text that can be written to via the serial bus to write a text via the pwe block set the parameter command ak to f hex the index characters high byte must be 5 92
- The block of process words is divided into two blocks of 16 bits which always occur in the defined sequence 92
- The value 100 a conversion factor of 0 means that the value transferred is multiplied by 0 the value 100 is therefore read as 10 92
- The various attributes of each parameter are displayed in factory setting parameter values are transferred as whole numbers only conversion factors are therefore used to transfer decimals 92
- To read a text via the pwe block set the parameter command ak to f hex the index character high byte must be 4 92
- Unsigned means that there is no operational sign in the telegram 92
- Writing a parameter value 92
- Assumptions 93
- Modbus rtu overview 93
- Reading a parameter value 93
- What the user should already know 93
- Change the active set up 94
- Control the frequency converter s built in relay 94
- Frequency converter with modbus rtu 94
- Message or if the slave is unable to perform the requested action the slave will construct an error message and send it in response or a time out occurs 94
- Modbus rtu message framing structure 94
- Modbus rtu message structure 94
- Refrigeration drive design guide 94
- Reset after a fault trip 94
- Rs 485 installation and set vlt 94
- Run at a variety of preset speeds 94
- Run in reverse 94
- Stop of the frequency converter in various ways coast stop quick stop dc brake stop normal ramp stop 94
- The bus reference is commonly used for speed control it is also possible to access the parameters read their values and where possible write values to them this permits a range of control options including controlling the setpoint of the frequency converter when its internal pi controller is used 94
- The control word allows the modbus master to control several important functions of the frequency converter 94
- The controllers are set up to communicate on the modbus network using rtu remote terminal unit mode with each byte in a message containing 2 4 bit hexadecimal characters the format for each byte is shown in table 7 2 94
- The frequency converter communicates in modbus rtu format over the built in rs 485 interface modbus rtu provides access to the control word and bus reference of the frequency converter 94
- The transmitting device places a modbus rtu message into a frame with a known beginning and ending point this allows receiving devices to begin at the start of the message read the address portion determine which device is addressed or all devices if the message is broadcast and to recognise when the message is completed partial messages are detected and errors set as a result characters for transmission must be in hexadecimal 00 to ff format in each field the frequency converter continuously monitors the network bus also during silent intervals when the first field the address field is received each frequency converter or device decodes it to determine which device is being addressed modbus rtu messages addressed to zero are broadcast messages no response is permitted for broadcast messages a typical message frame is shown in table 7 4 94
- To enable modbus rtu on the frequency converter set the following parameters 94
- Address field 95
- Coil register addressing 95
- Crc check field 95
- Data field 95
- Function field 95
- Start stop field 95
- Refrigeration drive design guide 96
- Rs 485 installation and set vlt 96
- Refrigeration drive design guide 97
- Rs 485 installation and set vlt 97
- Used to specify the index number to be used when accessing an indexed parameter 97
- For a full explanation of the structure of an exception code response please refer to 7 function field 98
- Function codes supported by modbus rtu 98
- How to access parameters 98
- How to control the frequency converter 98
- Modbus exception codes 98
- Modbus exception codes cod e name meaning 98
- Modbus rtu supports use of the following function codes in the function field of a message 98
- Parameter handling 98
- Refrigeration drive design guide 98
- Rs 485 installation and set vlt 98
- Storage of data 98
- The coil 65 decimal determines whether data written to the frequency converter are stored in eeprom and ram coil 65 1 or only in ram coil 65 0 98
- The pnu parameter number is translated from the register address contained in the modbus read or write message the parameter number is translated to modbus as 10 x parameter number decimal 98
- This section describes codes which can be used in the function and data fields of a modbus rtu message 98
- Conversion factor 99
- Examples 99
- Force write single coil 05 hex 99
- Parameter values 99
- Read coil status 01 hex 99
- Text blocks 99
- Description this function reads the contents of holding registers in the slave 100
- Example read 3 03 maximum reference register 03030 100
- Force write multiple coils 0f hex 100
- Query the query message specifies the coil 65 parameter write control to be forced coil addresses start at zero i e coil 65 is addressed as 64 force data 00 00hex off or ff 00hex on 100
- Query the query message specifies the starting register and quantity of registers to be read register addresses start at zero i e registers 1 4 are addressed as 0 3 100
- Read holding registers 03 hex 100
- Refrigeration drive design guide 100
- Response the normal response is an echo of the query returned after the coil state has been forced 100
- Response the normal response returns the slave address function code starting address and quantity of coils forced 100
- Rs 485 installation and set vlt 100
- The query message specifies the coils 17 to 32 speed set point to be forced 100
- This function forces each coil in a sequence of coils to either on or off when broadcast the function forces the same coil references in all attached slaves 100
- Description this function presets a value into a single holding register 101
- Description this function presets values into a sequence of holding registers 101
- Example write to 1 00 configuration mode register 1000 101
- Preset multiple registers 10 hex 101
- Preset single register 06 hex 101
- Query the query message specifies the register reference to be preset register addresses start at zero i e register 1 is addressed as 0 101
- Query the query message specifies the register references to be preset register addresses start at zero i e register 1 is addressed as 0 example of a request to preset two registers set parameter 1 24 738 7 8 a 101
- Refrigeration drive design guide 101
- Response the normal response is an echo of the query returned after the register contents have been passed 101
- Response the register data in the response message are packed as two bytes per register with the binary contents right justified within each byte for each register the first byte contains the high order bits and the second contains the low order bits 101
- Rs 485 installation and set vlt 101
- Bit 02 0 leads to dc braking and stop set braking current and duration in 2 01 dc brake current and 2 02 dc braking time bit 02 1 leads to ramping 102
- Bit 02 dc brake 102
- Bit 03 coasting bit 03 0 the frequency converter immediately lets go of the motor the output transistors are shut off and it coasts to a standstill bit 03 1 the frequency converter starts the motor if the other starting conditions are met 102
- Bit 04 quick stop bit 04 0 makes the motor speed ramp down to stop set in 3 81 quick stop ramp time 102
- Bit 05 hold output frequency bit 05 0 the present output frequency in hz freezes change the frozen output frequency only by means of the digital inputs 5 10 terminal 18 digital input to 5 15 terminal 33 digital input programmed to speed up and slow down 102
- Bits 00 01 bits 00 and 01 are used to choose between the four reference values which are pre programmed in 3 10 preset reference according to the following table 102
- Control word according to fc profile 8 10 control profile fc profile 102
- Explanation of the control bits 102
- Fc control profile 102
- Make a selection in 8 50 coasting select to define how bit 03 gates with the corresponding function on a digital input 102
- Make a selection in 8 56 preset reference select to define how bit 00 01 gates with the corresponding function on the digital inputs 102
- Refrigeration drive design guide 102
- Response the normal response returns the slave address function code starting address and quantity of registers preset 102
- Rs 485 installation and set vlt 102
- Status word according to fc profile stw 8 10 control profile fc profile 104
- Bus speed reference value 105
- General specifications 106
- General specifications and troubleshooting 106
- General specifications and vlt 106
- Refrigeration drive design guide 106
- General specifications and vlt 107
- Refrigeration drive design guide 107
- General specifications and vlt 108
- Refrigeration drive design guide 108
- General specifications and vlt 109
- Refrigeration drive design guide 109
- General specifications and vlt 110
- Refrigeration drive design guide 110
- General specifications and vlt 111
- Is a registered danfoss trademark 111
- Mg16g102 vl 111
- Refrigeration drive design guide 111
- Table 8 111
- With brake and load sharing 95 4 0 111
- General specifications and vlt 112
- Is a registered danfoss trademark 111 112
- Mains supply 3x525 690 v ac 112
- Mg16g102 vl 112
- Refrigeration drive design guide 112
- Table 8 mains supply 3x525 690 v ac 112
- Acoustic noise 118
- Efficiency 118
- Peak voltage on motor 118
- Affect the service life of the motor if the peak voltage is too high especially motors without phase coil insulation are affected if the motor cable is short a few metres the rise time and peak voltage are lower if the motor cable is long 100m the rise time and peak voltage increases 119
- Data are measured according to iec 60034 17 cable lengths are in metres 119
- Dc link voltage x 1 dc link voltage mains voltage x 1 5 119
- General specifications and vlt 119
- In motors without phase insulation paper or other insulation reinforcement suitable for operation with voltage supply such as a frequency converter fit a sine wave filter on the output of the frequency converter 119
- In the motor voltage before it stabilizes itself at a level depending on the voltage in the intermediate circuit the rise time and the peak voltage 119
- Refrigeration drive design guide 119
- Rise time increases decreases proportionally with cable length 119
- The natural induction causes an overshoot 119
- To obtain approximate values for cable lengths and voltages not mentioned below use the following rules of thumb 119
- General specifications and vlt 120
- Refrigeration drive design guide 120
- General specifications and vlt 121
- Refrigeration drive design guide 121
- General specifications and vlt 122
- High power range 122
- Refrigeration drive design guide 122
- Automatic adaptations to ensure performance 123
- Derating for ambient temperature 123
- Derating for low air pressure 123
- Purpose of derating 123
- Special conditions 123
- Alarm and status messages 124
- Derating for running at low speed 124
- Frequency converter once the problem has been rectified only the alarm continues flashing 125
- General specifications and vlt 125
- No description warning alarm trip alarm trip lock parameter reference 125
- Refrigeration drive design guide 125
- Alarm word and extended status word bit hex dec alarm word warning word extended status word 126
- General specifications and vlt 126
- No description warning alarm trip alarm trip lock parameter reference 126
- Refrigeration drive design guide 126
- 66the alarm words warning words and extended status words can be read out via serial bus or optional fieldbus for diagnosis see also par 16 90 16 92 and 16 94 127
- Alarm word and extended status word bit hex dec alarm word warning word extended status word 127
- Description of alarm word 2 and warning word 2 bit hex dec alarm word 2 warning word 2 127
- General specifications and vlt 127
- Refrigeration drive design guide 127
- Alarm words 128
- General specifications and vlt 128
- Refrigeration drive design guide 128
- General specifications and vlt 129
- Refrigeration drive design guide 129
- Warning words 129
- Extended status words 130
- General specifications and vlt 130
- Refrigeration drive design guide 130
- Warning alarm list 131
- Design guide 138
- Mg16g102 138
- Refrigeration drive 138
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