Advanced slave modbus settings – Perle Systems Perle IOLAN DS1 User Manual
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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
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
for function codes and I/O
coil/registration descriptions and
Accessing I/O Data Via TruePort on page
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
Request Queuing
When enabled, allows multiple, simultaneous messages to be queued and
processed in order of reception.
Default: Enabled