14-17
14 Serial Communications
CP2E CPU Unit Software User’s Manual(W614)
14-4 Modbus-RTU Easy Master Function
14
14-4-3 Setting and Word Allocation
When the Modbus-RTU communication abnormality occurs, the following bits are turned ON.
A638 02 Serial Port 1 (EX) of CP2E
Nîš…îš…-type CPU Unit
Modbus-RTU Master Execution Error Flag
ON: Execution error.
OFF: Execution normal or still in progress.
01 Modbus-RTU Master Execution Normal Flag
ON: Execution normal.
OFF: Execution error or still in progress.
00 Modbus-RTU Master Execution Bit
Turned ON: Execution started
ON: Execution in progress.
OFF: Not executed or execution completed.
Address Name Contents
A392.04 Serial Port 1/Built-in RS-232C Port
Communication Error Flag
Turns ON when a timeout error, an overrun error, a
framing error or a parity error occurs on Modbus-RTU
Easy Master with serial port 1 or built-in RS-232C port.
A392.12 Serial Port 2/Built-in RS-485 Port Com-
munication Error Flag
Turns ON when a timeout error, an overrun error, a
framing error or a parity error occurs on Modbus-RTU
Easy Master with serial port 2 or built-in RS-485 port.
A50.04 Serial Port 1(EX) Communication Error
Flag
Turns ON when a timeout error, an overrun error, a
framing error or a parity error occurs on Modbus-RTU
Easy Master on serial port 1(EX).
Word Bit Port Contents
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