User Guide

Programming Honeywell • 17
5.3 Modbus RTU parameter descriptions
5.3.1 Modbus RTU Parameters
P5.7.3.1.1 S
LAVE ADDRESS
Each slave must have a unique address (from 1 to 247) so that it can be addressed indepen-
dently from other nodes.
P5.7.3.1.2 B
AUD RATE
Select the communication speed for the network. The default value is 9600 baud.
P5.7.3.1.3 P
ARITY TYPE
Users can select the parity type for the network.
Table 7. Parity type
P5.7.3.1.4 COMMUNICATION TIME-OUT
Modbus board initiates a communication error for a time defined with this parameter. ‘0’ means
that no fault is generated.
5.3.2 Modbus RTU monitoring values
P5.7.3.2.1 F
IELDBUS PROTOCOL STATUS
Fieldbus Protocol Status tells the status of the protocol.
Table 8. FB protocol statuses
P5.7.3.2.2 COMMUNICATION STATUS
0The Communication status shows how many error and how many good messages the drive
has received. The Communication status includes a common error counter that counts CRC
and parity errors and a counter for good messages.
Only messages to the current slave in use are counted in the good messages.
Parity type Stopbits
None 0
Odd 1
Even 2
INITIALIZING Protocol is starting up
STOPPED Protocol is timeouted or not used
OPERATIONAL Protocol is running
FAULTED
Major fault in protocol, requires restarting.
If fault remains call Honeywell Technical Support
at 888-516-9347 “Option 4”.