Mitsubishi Electric MELSEC-A Series Manual page 212

5
REPLACEMENT OF THE MELSECNET/10 (REMOTE I/O NETWORK)
(3) Utilizing existing programs
If the system configurations before and after the replacement are the same, program modifications are
not required.
When an intelligent function module is mounted on the remote I/O station, the buffer memory read or
write functions using the dedicated link instruction of the CPU module on the master station. In such a
case, if the specifications such as I/O signals or buffer memory addresses are different between the
modules before and after the replacement, a program modification is required.
The figure below shows the example of modifying the program related to the dedicated link instruction
when the CPU module on the master station is the AnUCPU and the A62DA (analog output module) is
replaced with the Q62DAN.
Program related to the dedicated link instruction of the existing AnUCPU
* Write data to the buffer memory area in the analog output side.
41
43
* Check the output value write completion.
76
* Change SUB H0 into SUB H1 because the buffer memory address
for writing the analog output value of the Q62DAN changes H1.
For details on replacements of intelligent function modules, refer to the following.
Transition from MELSEC-A/QnA (Large Type) Series to Q Series Handbook (Intelligent Function
Modules)
Transition from MELSEC-AnS/QnAS (Small Type) Series to Q Series Handbook (Intelligent Function
Modules)
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