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(b) Specifying a connection target using a programming tool (personal computer)
CPU numbers are used to specify a CPU module to which a programming tool is connected.
(3) Checking the host CPU number
The host CPU number of a QCPU is stored in SD395 (Multiple CPU system information). A host CPU number
check program (refer to an example below) should be created. If created, the following status can be checked
easily.
• Incorrect mounting status of the QCPU
• Program writing status to other CPU modules using the programming tool
In the following program, if the QCPU to which the program is written is other than CPU No.1 (if the value in
SD395 is other than "1"), the annunciator (F1) turns on. Accordingly, the USER LED of the QCPU turns on.
The corresponding annunciator number is stored in SD62 (Annunciator number).
Slot number
CPU 0 1 2
A programming tool
communicates with
CPU No.2.
CPU number
1
4
3
2
Specify "PLC No.2".
<> K1 SD395
Set the CPU number to be compared.
SET F1