Mitsubishi MELSEC L Series User Manual page 149

Error
Error Contents and Cause
Code
[BRANCH UNIT ERR.]
An error was detected in the branch module.
■Collateral information
• Common information: Module No. (Slot No.)
1740
• Individual information: -
■Diagnostic Timing
• Always
[EXTEND UNIT ERR.]
An error was detected in the extension module.
■Collateral information
• Common information: Module No. (Block No.)
1750
• Individual information: -
■Diagnostic Timing
• At power-ON/At reset
*1 CPU operations when an error occurred can determined with a parameter. (LED indication varies according to the status
of the CPU module)
*3 The BAT. LED turns on or flashes if the BATTERY ERROR occurs.
*6 Intelligent function module operations when an error occurred can be selected with a parameter from either to stop or
continue.
*7 This applies when the function version is A or later.
*8 This applies when the function version is B or later.
*10 This applies when the first five digits of the serial number is "04101" or later.
*12 This applies when the first five digits of the serial number is "07032" or later.
*13 This applies when the first five digits of the serial number is "08032" or later.
*15 This applies when the first five digits of the serial number is "09012" or later.
*17 This applies when the first five digits of the serial number is "10042" or later.
*19 This applies to the Universal model QCPU except for the Q00UJCPU, Q00UCPU, and Q01UCPU.
*20 This applies to the Universal model QCPU except for the Q00UJCPU, Q00UCPU, Q01UCPU, and Q02UCPU.
*21 This applies to the Built-in Ethernet port QCPU.
*27 This applies to the Universal model QCPU whose serial number (first five digits) is "13042" or later.
*28 This applies when the first five digits of the serial number is "13072" or later.
*29 This applies to the Q10UD(E)HCPU, Q13UD(E)HCPU, Q20UD(E)HCPU, and Q26UD(E)HCPU.
Corrective Action
• Replace the branch module.
• Reset the CPU module and run it again. If the
same error code is displayed again, the cause is
a hardware failure of the CPU module, I/O
module, intelligent function module, END cover,
branch module, or extension module. (Please
consult your local Mitsubishi representative,
explaining a detailed description of the
problem.)
• Replace the extension module.
• Reset the CPU module and run it again. If the
same error code is displayed again, the cause is
a hardware failure of the CPU module, I/O
module, intelligent function module, END cover,
branch module, or extension module. (Please
consult your local Mitsubishi representative,
explaining a detailed description of the
problem.)
APPENDICES
LED Status Corresponding
CPU Status CPU
RUN:
Off
ERR.:
*28
Flicker
LCPU
CPU Status:
Stop
147
A