Data Point Connections; Communication Fault; Drive Feedback - ABB FBIP-21 BACnet/IP User Manual

Data point connections

The BACnet access points in the above drive parameter connections are linked to the
following data points:
BACnet access point
AV43
AV42

Communication fault

￭
BACnet has no built-in feature to detect communication timeout, because it is not a
synchronous protocol. If communication timeouts are needed, you can use the following
parameters to detect timeouts based on different packets and specifying the drive
action.
Full timeout time is the sum of parameters 51.20 Timeout time and 50.03 FBA A comm
loss t out.
Drive parameter
51.21 Timeout mode
51.20 Timeout time
50.02 FBA A comm loss func
50.03 FBA A comm loss t out

Drive feedback

￭
The inputs to the controller (drive outputs) have pre-defined meanings established
by the protocol. This feedback does not required drive configuration.
The following table lists a sample of the feedback data. For a complete listing, see the
input word/point/object listings in the chapter
Drive parameter
40.91 Feedback data storage
40.92 Setpoint data storage
Value
1 = Any packet
2 = Control RW
0...65535
0 = No action
1 = Fault
2 = Last speed
3 = Speed ref safe
4 = Fault always
5 = Warning
0.3...6553.5 s
Description
Storage parameter for
process feedback value
Storage parameter for
process setpoint value
Description
Defines the message type that
resets the timeout counter for
detecting communication loss
between the drive and the master.
Sets the delay time for directing
messages to the drive before a
communication loss condition is
declared.
• If value is zero, the feature is
disabled.
• If value is non-zero, the time is
in units of 100 ms. For ex-
ample, a value of 300 is 30.0
seconds.
Selects how the drive reacts upon
a fieldbus communication break.
The time delay is defined by
parameter 50.03 FBA A comm loss
t out.
Defines the time delay before the
action defined by parameter
50.02 FBA A comm loss func is
taken.
Communication protocol (page
Start-up 33
12
39).