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178 IOLAN SDS/SCS/STS/MDC User’s Guide, Version 4.0
Modbus Slave Advanced Settings Field Descriptions
Configure the following parameters:
End IP Address Displays the ending IP address of the TCP/Ethernet Modbus Slaves, based on
the Start IP address and the UID range (not supported for IPv6 addresses).
Field Format: IPv4 address
Protocol Specify the protocol that is used between the Modbus Master and Modbus
Slave(s).
Data Options: TCP or UDP
Default: TCP
UDP/TCP Port The destination port of the remote Modbus TCP Slave that the IOLAN will
connect to.
Range: 0-65535
Default: 502
TCP/UDP Port The network port number that the Slave Gateway will listen on for both TCP
and UDP messages.
Default: 502
Next Request Delay A delay, in milliseconds, to allow serial slave(s) to re-enable receivers before
issuing next Modbus Master request.
Range: 0-1000
Default: 50 ms
Enable Serial
Modbus Broadcasts
When enabled, a UID of 0 (zero) indicates that the message will be broadcast to
all Modbus Slaves.
Default: Disabled
Request Queuing When enabled, allows multiple, simultaneous messages to be queued and
processed in order of reception.
Default: Enabled