User Guide

Honeywell • 20 Programming
5.4.2 Modbus TCP settings
5.4.2.1
Common settings
P5.8.2.1.1 CONNECTION LIMIT
Defines how many clients can access the server simultaneously.
P5.8.2.1.2 U
NIT IDENTIFIER NUMBER
The Modbus ‘slave address’ field usually used on Modbus Serial Line is replaced by a single
byte ‘Unit Identifier’.
On TCP/IP, the Modbus server is addressed using its IP address; therefore, the Modbus Unit
Identifier is useless.
P5.8.2.1.3 C
OMMUNICATION TIME-OUT
Modbus board initiates a communication error if the Ethernet connection is lost. Communica-
tion time-out parameters define the minimum delay between packages received from the client.
The timer is reset and started after each received package. This parameter can be used if the
client is periodically polling the slaves.
5.4.3 Modbus TCP monitoring values
These values will not appear before the connection is established.
5.4.3.1
Connection 1
P5.8.2.2.1.1 FIELDBUS PROTOCOL STATUS
Fieldbus Protocol Status tells the status of the protocol.
Table 10. FB protocol statuses
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”.