Mitsubishi Electric MELSEC Q Series User Manual page 104

(4) Precautions for using QCPU of function version A
When the multiple CPU system has been configured using a QCPU of function version A, an error occurs and the
multiple CPU system is not started.
Errors shown in Table2.25 will occur and the multiple CPU system will not start up if function version A High
Performance model QCPUs and High Performance model QCPU/Process CPU are used on a multiple CPU
system.
If any of the errors shown in Table2.25 are displayed after executing the CPU diagnosis function of GX Developer
Version 6 or later, replace the High Performance model QCPU of function version A with that of a function version
B.
CPU No.1
High Performance model QCPU of
function version A
High Performance model QCPU of
function version A
High Performance model QCPU/
Process CPU of function version B
High Performance model QCPU/
Process CPU of function version B
*1: The following errors may occur except "MULTI EXE. ERROR" when the programmable controller is turned on or the High Performance
model QCPU for CPU No.1 is reset.
error code
"CONTROL-BUS ERR. (
error code
"MULTI CPU DOWN (
Table2.25 List of operations for each case
CPU Nos. 2 to 4
High Performance model QCPU of
function version A
High Performance model QCPU/
Process CPU of function version B
High Performance model QCPU of
function version A
High Performance model QCPU/
Process CPU of function version B
:1413/1414)"
:7000/7002)"
CHAPTER2 SYSTEM CONFIGURATION
Status of CPU No.1 Status of CPU Nos. 2 to 4
UNIT VERIFY ERR.
(error code:2000)
UNIT VERIFY ERR.
(error code:2000)
*1
MULTI EXE.ERROR
(error code:7010)
No error
SP.UNIT LAY ERR.
(error code:2125)
*1
MULTI EXE.ERROR
(error code:7010)
SP.UNIT LAY ERR.
(error code:2125)
No error
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