Program Comparisons - Mitsubishi Electric MELSEC-A Series Manual

5
REPLACEMENT OF THE MELSECNET/10 (REMOTE I/O NETWORK)

5.2.6 Program comparisons

This section describes how to modify the existing programs when replacing MELSECNET/10 remote I/O
stations with MELSECNET/H (MELSECNET/10 mode) remote I/O stations.
(1) Link special relay (SB)/link special register
Program modifications related to link special relay (SB) and link special register (SW) are not required
because the link special relay (SB) and link special register (SW) of the CPU module on the master
station are used.
For details, refer to either of following manuals according to the CPU module used on the master
station.
Type MELSECNET/10 Network System (Remote I/O network) Reference Manual
For QnA/Q4AR MELSECNET/10 Network System Reference Manual
(2) Network parameters
(a) Master station
The items specific to remote I/O stations (such as I/O assignments of a remote I/O station) must be
set at the remote I/O station. Therefore, delete these items from the network parameter of the master
station. For details on the items set at the remote I/O station, refer to Section 5.2.5.
(b) Remote I/O station
Set the necessary parameters (refer to Section 5.2.5) at the remote I/O station.
If the parameters are not set, modules operate with the default settings and these operations may
differ from the desired ones.
When mounting an intelligent function module, configure the switch setting for I/O assignments.
The figures below show the setting example of I/O assignments on the following conditions; the
system has one remote I/O station, the system configurations before and after the replacement are
the same, and an intelligent function module is mounted on the remote I/O station.
I/O assignments of the remote I/O station (set in the network parameter at the existing master station)
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Delete the parameters to set them on the remote I/O station side.