ABB ACH550-02-645A-4 [15/32] Mailbox read write

ABB ACH550-02-645A-4 [15/32] Mailbox read write
ACH550 BACnet User’s Manual 15
Start-up
Feedback from the Drive
Pre-defined Feedback
Inputs to the controller (drive outputs) have pre-defined meanings established by the
protocol. This feedback does not require drive configuration. The following table lists
a sample of feedback data. For a complete listing, see input word/point/object
listings in the "Technical Data" section.
Mailbox Read/Write
The ACH550 provides a “Mailbox” function to access parameters that have not been
pre-defined by the protocol. Using mailbox, any drive parameter can be identified
and read. Mailbox can also be used to adjust parameter settings by writing a value to
any parameter identified. The following table describes the use of this function.
Note! You must read and write mailbox values using the drive’s internal scaling. For
example, the parameter 2202,
ACCEL TIME1, has a resolution of 0.1 sec., which means that, in
the drive (and in the mailbox), the value 1 = 0.1 seconds. So, a mailbox value of 10 translates
to 1.0 second, a mailbox value of 300 translates to 30.0 seconds, etc. Refer to the parameter
listing in the ACH550 User’s Manual for each parameter’s resolution and units of measure.
Note! Relay status feedback occurs without configuration as defined below.
Drive Parameter BACnet Access Point
0102 SPEED AV0
0103 FREQ OUTPUT AV1
0104 CURRENT AV4
0105 TORQUE AV5
0106 POWER AV6
0107 DC BUS VOLT AV2
0109 OUTPUT VOLTAGE AV3
0115 KWH COUNTER AV8
0118 DI1-3 STATUS BI6, BI7, BI8
0122 RO1-3 STATUS BI0, BI1, BI2
Drive Parameter
BACnet Access
Point
Mailbox Parameter Enter the number of the drive parameter to access. AV25
Mailbox Data Contains the parameter value after a read, or enter the desired parameter
value for a write.
AV26
Mailbox Read A binary value triggers a read – the value of the “Mailbox Parameter”
appears in “Mailbox data”.
BV15
Mailbox Write A binary value triggers a write – the drive value for the “Mailbox Parameter”
changes to the value in “Mailbox data”.
BV16
Drive Parameter Value BACnet Access Point
0122 RO 1-3 STATUS Relay 1…3 status. BI0, BI1, BI2
0123
RO 4-6 STATUS Relay 4…6 status. BI3, BI4, BI5

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