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Settings
Advanced Slave Modbus Settings
The parameters in this window configure global Modbus gateway settings that apply to all serial ports
configured first as the
Modbus Gateway profile and then as a Modbus Slave.
Configure the following parameters:
Enable I/O Access
via TruePort
Enables/disables serial application access to the I/O over the network using the
TruePort COM redirector feature.
Default: Disabled
Enable SSL
Encryption
Enables/disables SSL encryption for the I/O data between the IOLAN and the
TruePort host.
Default: Disabled
Listen TCP Port The TCP port that the IOLAN will listen to for I/O channel data requests from
TruePort.
Default: 33816
Allow I/O Access
via API through
TruePort
Allows serial application access to the I/O over the network using the TruePort
COM redirector feature via a custom application using the Perle API.
Default: Permanently enabled when
Enable I/O Access via TruePort is
enabled
See Modbus I/O Access on page 278 for function codes and I/O
coil/registration descriptions and Accessing I/O Data Via TruePort on page
285 for the Perle API.
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