4–84 MULTINET4 MULTI-PORT SERIAL SERVER & MANAGED SWITCH – INSTRUCTION MANUAL
SYSTEM ADMINISTRATION CHAPTER 4: SYSTEM ADMINISTRATION
4.5.3.3 Modbus: Local Masters
This screen enables you to configure local serial Modbus Masters that will act as Modbus/
TCP clients.
FIGURE 4–49: Serial: Modbus: Local Masters
This screen is used to define the directly connected Modbus Master devices. The table
below specifies the parameters you can edit in the Serial: Modbus: Local Masters screen.
TCP Port The TCP port upon which this serial port can be accessed. Be
sure to disable the fixed mapping before swapping ports.
State Whether or not the fixed mapped TCP port is enabled
Table 4–50: Modbus: Local Masters
Field Name Field Value
Port ID: A unique identifier for the serial port to which the device is
connected.
Protocol Variant: Specify a serial transmission mode. Valid options are:
• RTU – Messages are binary encoded with CRC and begin
with a silent interval of 3.5 character times.
• ASCII – messages are ASCII encoded with LRC and begin
with a ':' character and end with a CRLF sequence.
Default value = RTU
Field Name Field Value
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