User Guide

Honeywell • 10 PROGRAMMING
4.1 BACnet MS/TP parameters and monitoring values
Table 3. Parameters related with BACnet used through MS/TP
Code Parameter Min Max Default ID Description
P5.8.3.1.1 Baud rate 9600 76800 9600 2392
Communication speed
1 = 9600
2 = 19200
3 = 38400
4 = 76800
5 = Autobaud
P5.8.3.1.2 MAC Address 1 127 1 2331 BACnet device MAC address
P5.8.3.1.3 Instance number 0 4194304 automatic 2332
Device Object's instance number.
0 = Automatically
generated from the last 22 bit from
Ethernet MAC address.
P5.8.3.1.4 MaxMaster 1 127 127 2561
Max Master parameter of device object.
This can be used to reduce poll for
master cycles.
P5.8.3.1.5
Communication
time-out
0 65535 10 2333
Defines the number of seconds after
which a communication timeout is indi-
cated after a communication break.
Value 0 disables this feature.
P5.8.3.1.6 MaxAPDUcycle 0 65535 0 2554
Defines the number of seconds after
which the next application level mes-
sage is shown after a communication
break. Value 0 disables this feature.
Table 4. Monitoring values
Code Parameter Min Max ID Description
V5.8.3.2.1 Fieldbus protocol status INITIALIZING INACTIVE 2393 See Tab l e 9
V5.8.3.2.2 Communication status 0.0 99.999 2394
Counter for failed and good messages
failed msg's <-> good msg's
V5.8.3.2.3 Actual instance 0 4194304 2395
Actual instance in use. If the instance
parameter is 0, the generated instance
number shows here.
V5.8.3.2.4 Last fault
See fault codes
(table Table 8) 2396
Information about the latest fault
detected.
V5.8.3.2.5 UartDBG 0.0.0
32767.
32767.
32767
2559
Uart error counters in the following
order:
framing errors.
overrun errors.
parity errors.
V5.8.3.2.6 ActiveCOVcount 0 20 2558 Number of active COV subscriptions
V5.8.3.2.7 Control Word 0 FFFFFFFF 2397 Control word monitor value
V5.8.3.2.8 Status Word 0 FFFFFFFF 2398 Status word monitor value