ABB FBIP-21 BACnet/IP, User Manual

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Data point connections
The BACnet access points in the above drive parameter connections are linked to the
following data points:
Description Drive parameter BACnet access point
Storage parameter for
process feedback value 40.91 Feedback data storage AV43
Storage parameter for
process setpoint value 40.92 Setpoint data storage AV42
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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.
Description Value Drive parameter
Defines the message type that
resets the timeout counter for
detecting communication loss
between the drive and the master. 1 = Any packet
2 = Control RW
51.21 Timeout mode
Sets the delay time for directing
messages to the drive before a
communication loss condition is
declared. 0...65535 51.20 Timeout time
• 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. 0 = No action
1 = Fault
2 = Last speed
3 = Speed ref safe
4 = Fault always
50.02 FBA A comm loss func
5 = Warning
Defines the time delay before the
action defined by parameter
50.02 FBA A comm loss func is
taken. 0.3...6553.5 s 50.03 FBA A comm loss t out
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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
Communication protocol (page 39) .
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