S+S Regeltechnik THERMASGARD ALTM 2 - EtherCAT P [31/64] Continued

S+S Regeltechnik THERMASGARD ALTM 2 - EtherCAT P [31/64] Continued
31
G
EtherCAT P
| Configuration (pressure)
MODULE PRESSURE
(
SDO
)
continued
Object
DataType Name Description
SDO
0x80n1 Measurement Configuration SDO
USINT Sampling Intervall 0: Default
1- 5: 50250 ms in 50 ms steps
6–12: 300900 ms in 100 ms steps
13–19: 1–5 s in 500 ms steps
BIT6 Filtering Number Number of filter values
BIT3 History Time Intervall 0: 0.5 h
1: 1 h
2: 6 h
3: 12 h
4: 24 h
5–7:
0x80n2
REAL
Pressure Offset
Manual Offset
SDO
0x90n0
STRING(20)
Pressure Description
‘Device Differential Pressure’ information text
SDO
0x90n1
STRING(8)
Pressure Unit
Unit information text
SDO
0x90n2 Pressure Configuration SDO
UINT Sample Time (ms) Sample time in ms
USINT Filtering Number (n) Filter number of entries
UINT History Time (min) Min/max interval time in min
Value Sample time for sampling interval
(
0x80n1
)
Steps
0 Default Default value of sensor
1...5 50, 100, 150, 200, 250 ms 50-250 ms @ 50 ms steps
6...12 300, 400, 500, 600, 700, 800, 900 ms 300-900 ms @ 100 ms steps
13...19 1.0, 1.5, 2.0, 2.5, 3.0, 4.5, 5.0 s 1-5 s @ 500 ms steps
Description
MODULE PRESSURE
The current differential pressure value with its historical minimum and maximum values is queried by the TxPDOs
Pressure Value
and
Pressure History
(equivalent to the data objects 0x60n0 and 0x60n1).
The TxPDO
Pressure Service
is subdivided into the Maintenance object (maintenance information) and Pressure Status (measured
value information). In the
Maintenance
object (equivalent to the data object 0x60n2), dynamic ageing is displayed depending on the
working point of the sensor as a recommended number of remaining operation hours until the next recalibration. (Rem.: This value is
informative and is reset via the service interface). The
Pressure Status
object (equivalent to the data object 0x60n3) provides
information about the validity status of the measured value. During normal operation, this register switches between 0 and 1 for each
measured value determined. In case of over/underflow of measuring range or error detection, the corresponding code number is
displayed (see table).
The RxPDO
Noise Reduction
(equivalent to the data object 0x70n0) uses the definition of the
Middle Value
and associated
Tolerance
Band
to enable a smooth display of the measured value in the specified tolerance band. This function is switched on by means of
Enable
. If the measured value is within the tolerance band, the middle value is used as an output value.
The configuration object
Pressure Display
(
0x80n0
)
sets the display behaviour of the bar graph and LCD. In this case, the value range
of the bar graph can be defined using the start point
Bar Graph Minimum Value
and the end point
Bar Graph Maximum Value
, and its
colour (standard white) edited. Refer to the bar graph module for the colours Level OK, Level WARN and Level ERR. If it is not
available, green, yellow and red are used as specified colours. A system-specific display text (7 characters) for the lower line can also
be specified.
In the
Pressure Adjust
object, a pressure zero-point comparison can be performed manually. On devices not fitted with an auto-zero
valve, the pressure connections must be connected to one another by a section of hose. The AutoZero bit is then set to start the
comparison process, which lasts for approx. 20 seconds. The AutoZero bit must then be reset.
The
Measurement Configuration
(
0x80n1
)
object defines the setting for recording the measured value. The sample interval, the filter
midpoints and the time interval for the historical data are specified here. Depending on the measurement requirement, data filtering
can be set very precisely. The settling time is derived by multiplying the sample time with the number of filter points. The viewing
period for recording the minimum/maximum value and an optional offset configuration for the measured value correction can be defined
here.
The
Pressure Description
(
0x90n0
)
object contains the module description in text form, the
Pressure Unit
(
0x90n1
)
object displays
the measurand unit and the
Pressure Configuration
(
0x90n2
)
object provides information about the set measurement configurations
in the corresponding time units.

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