20.3 Error Codes Table
■
Self-diagnostic error code
Error codes 1 to 6
Code Name
Operatin
g
Error contents and steps to take
1 CPU hardware error 1 Stop
There may be a hardware problem. Please contact your dealer.
2 CPU hardware error 2 Stop
3
I/O bus power supply error
(including "no end cover")
Stop
Error in the I/O bus part is probable, such that the end unit has
not been attached. Double-check the attachment status of
units. This error also occurs when an expansion cable is
removed during operation.
4
Unit attachment limit
exceeded
Stop
is probable that the unit attachment limit has been exceeded.
Double-check the configuration.
5 Project data error Stop Turns on when there is an error in project data.
6
Expansion unit power
supply synchronization
error
Stop
Turns on when there is an error in the expansion block side
such that the power to the expansion unit is not on or the
expansion cable is not connected correctly when the power
turns on. The wait time until the power turns on can be set in
the I/O map configuration dialog box.
Error codes 20 to 27
Code Name
Operatin
g
Error contents and steps to take
20 Syntax error
Stop
Auto
clear
A program with a syntax error has been written. Switch to the
PROG. mode and correct the error.
21 Duplicated use
Stop
Auto
clear
The same relay is used multiple times in OT instruction, etc.
Switch to the PROG. mode and correct the error. Or, set the
duplicated output to “enable” in the CPU configuration.
Applicable devices and instructions are as follows.
● Operation device (X, Y, R, L), timer/counter instruction,
SSTP instruction
22 Not paired
Stop
Auto
clear
For instructions which must be used in a pair, one instruction is
either missing or in an incorrect position. Switch to the PROG.
mode and enter the two instructions which must be used in a
pair in the correct positions.
Applicable instructions and cases are as follows.
● MC and MCE are not paired
● LBLs corresponding to LOOP and JP are not located in the
same area (normal program area / same sub-routine area /
same interrupt program area)
● There are no sub-routines corresponding to CALL and
FCALL
● There is no STPE corresponding to SSTP
24
Program area error
Stop
Auto
clear
An instruction that can only executed in a specified area is
written in another location. Switch to the PROG. mode and
correct the error.
Applicable instructions and cases are as follows.
20.3 Error Codes Table
WUME-FP7CPUPGR-12 20-17
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