Omron CP1E CPU UNIT SOFTWARE - Error Codes

14-13
14 Serial Communications
CP1E CPU Unit Software User’s Manual(W480)
14-4 Modbus-RTU Easy Master Function
14
14-4-3 Setting and Word Allocation
 Error Codes
 Related Auxiliary Area Words and Bits
The Modbus-RTU command set in the DM fixed allocation words for the Modbus-RTU Easy Master
is automatically sent when the Modbus-RTU Master Execution Bit is turned ON. The results (normal
or error) will be given in corresponding flags.
Code Description Description
00 hex Normal end −
01 hex Illegal address The slave address specified in the parameter is illegal (248 or higher).
02 hex Illegal function code The function code specified in the parameter is illegal.
03 hex Data length overflow There are more than 94 data bytes.
04 hex Serial communications mode
error
The Modbus-RTU Easy Master function was executed when the
serial communications mode was not the Modbus-RTU Easy Mas-
ter Mode or when the option board is not equipped.
80 hex Response timeout A response was not received from the slave.
81 hex Parity error A parity error occurred.
82 hex Framing error A framing error occurred.
83 hex Overrun error An overrun error occurred.
84 hex CRC error A CRC error occurred.
85 hex Incorrect confirmation address The slave address in the response is different from the one in the
request.
86 hex Incorrect confirmation function
code
The function code in the response is different from the one in the
request.
87 hex Response size overflow The response frame is larger than the storage area (92 bytes).
88 hex Exception response An exception response was received from the slave.
89 hex Service being executed A service is already being executed (reception traffic congestion).
8A hex Execution canceled Executing the service has been canceled.
8F hex Other error Other FINS response code was received.
Word Bit Port Contents
A640 02 Built-in RS-232C port of
CP1E N14/20/30/40/60 or
NA20 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.
A641 02 Serial option port of CP1E
N30/40/60 or NA20 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.