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174 IOLAN SDS/SCS/STS/MDC User’s Guide, Version 4.0
General Tab Field Descriptions
Configure the following parameters:
Mode
Destination Slave
IP Mappings
Button
Advanced Slave
Settings Button
UID Range
Modbus/RTU
Modbus/ASCII
Append CR/LF
Specify how the Modbus Gateway is defined on the serial port.
Data Options:
z Modbus Master—Typically, the Modbus Master is connected to the
Serial Port and is communicating to Modbus Slaves on the network.
z Modbus Slave—Typically, the Modbus Master is accessing the IOLAN
through the network to communicated to Modbus Slaves connected to the
IOLAN’s Serial Ports.
Default: Modbus Master Gateway
Click this button to launch the Destination Slave IP Settings window, where
you can configure the TCP/Ethernet Modbus Slaves that the Modbus Master on
the Serial Port will communicate with.
Click this button to configure global Modbus Slave settings.
You can specify a range of UIDs (1-247), in addition to individual UIDs.
Field Format: Comma delimited; for example, 2-35, 50, 100-103
Select this option when the Modbus/RTU protocol is being used for
communication between the Modbus Master and Slave.
Default: Enabled
Select this option when Modbus/ASCII protocol is being used for
communication between the Modbus Master and Slave.
Default: Disabled
When Modbus/ASCII is selected, adds a CR/LF to the end of the transmission;
most Modbus devices require this option.
Default: Enabled