Error Codes - Omron CP1E CPU UNIT SOFTWARE User Manual

Error Codes

Code
00 hex Normal end
01 hex Illegal address
02 hex Illegal function code
03 hex Data length overflow
04 hex Serial communications mode
error
80 hex Response timeout
81 hex Parity error
82 hex Framing error
83 hex Overrun error
84 hex CRC error
85 hex Incorrect confirmation address
86 hex Incorrect confirmation function
code
87 hex Response size overflow
88 hex Exception response
89 hex Service being executed
8A hex Execution canceled
8F hex Other error
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.
Word
A640
A641
CP1E CPU Unit Software User's Manual(W480)
Description
The slave address specified in the parameter is illegal (248 or higher).
The function code specified in the parameter is illegal.
There are more than 94 data bytes.
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.
A response was not received from the slave.
A parity error occurred.
A framing error occurred.
An overrun error occurred.
A CRC error occurred.
The slave address in the response is different from the one in the
request.
The function code in the response is different from the one in the
request.
The response frame is larger than the storage area (92 bytes).
An exception response was received from the slave.
A service is already being executed (reception traffic congestion).
Executing the service has been canceled.
Other FINS response code was received.
Bit Port
02 Built-in RS-232C port of
CP1E N14/20/30/40/60 or
NA20 CPU Unit
01
00
02 Serial option port of CP1E
N30/40/60 or NA20 CPU
Unit
01
00
14 Serial Communications
Description
−
Contents
Modbus-RTU Master Execution Error Flag
ON: Execution error.
OFF: Execution normal or still in progress.
Modbus-RTU Master Execution Normal Flag
ON: Execution normal.
OFF: Execution error or still in progress.
Modbus-RTU Master Execution Bit
Turned ON: Execution started
ON: Execution in progress.
OFF: Not executed or execution completed.
Modbus-RTU Master Execution Error Flag
ON: Execution error.
OFF: Execution normal or still in progress
Modbus-RTU Master Execution Normal Flag
ON: Execution normal.
OFF: Execution error or still in progress.
Modbus-RTU Master Execution Bit
Turned ON: Execution started
ON: Execution in progress.
OFF: Not executed or execution completed.
14
14-13