Troubleshooting When The Error "Can't Exe. Prg" Occurs In A Plc Cpu - Mitsubishi Electric MELSEC Q Series Programming Manual

6 TROUBLESHOOTING
6.4 Troubleshooting when the Error "CAN'T EXE. PRG." Occurs in a PLC CPU
"SSU_CMP.QPG", "SLS_CMP.QPG",
"SNT_CMP.QPG" had a
"CAN'T EXE. PRG." error in the PLC CPU
Safety observation error occurs
at Motion CPU?
YES
Safety observation error 34,
detailed code =31H?
NO
Safety observation error 34,
detailed code =30H?
NO
Eliminate the factor of the error,
and turn power supply back ON.
If a self-diagnostic error (error code: 2500) "CAN'T EXE. PRG." occurs in a PLC CPU
and the cause is in a sequence programs for safety observation (file name:
SSU_CMP.QPG, SLS_CMP.QPG, SNT_CMP.QPG), follow the procedure below. In
addition, the name of the faulty sequence program can be confirmed in the PLC
diagnostic screen of
GX Works2/GX Developer.
NO [Factor of error 1]
Change the incompatible functions setting
YES [Factor of error 2]
Change the device points setting
YES [Factor of error 3]
Erase SSU_CMP, SLS_CMP, SNT_CMP
and turn power supply back ON.
(Note-1): The following shows the added functions related to device settings which are
described in QnUCPU User' Manual (Function Explanation, Program
Fundamentals) and Motion CPU supports.
• Extension of bit device
• 32 bit index indexing by "ZZ"
• Extension data register (D) and extension link register (W)
• Local device setting for index register
If new functions related to the device setting other than the above are used
in a PLC CPU, a "CAN'T EXE. PRG." error occurs and a program may not
operate.
A new function not listed
in Note-1 is being
used?
YES
END
6 - 13
[Factor of error 1]
A function incompatible with
NO Motion CPU is used at device
setting.
[Factor of error 2]
Necessary device points are not
set for operation of sequence
programs for safety observation
at device setting.
[Factor of error 3]
SSU_CMP, SLS_CMP,
SNT_CMP is not updated after
change of points setting at
device setting.
SSU_CMP, SLS_CMP,
SNT_CMP is not updated after
change of "ZR device index
qualification setting" at device
setting.