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

42 Start-up

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 tout.
Drive parameter
51.21 Timeout mode
51.20 Timeout time
Drive parameter
40.91 Feedback
data storage
40.92 Setpoint
data storage
Value
1 = Any packet
2 = Control RW
0...65535
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 example, a
value of 300 is 30.0 seconds.