Other Precautions - Mitsubishi Electric MELSEC-A Series Manual

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

5.1.8 Other precautions

(1) Remote I/O network replacement precautions
Replace all remote I/O stations with Q series MELSECNET/H modules when the CPU module on the
remote master station is replaced with a Q series CPU module
On the MELSECNET/H remote I/O network, the A/AnS/QnA/QnAS series MELSECNET/10 module and
the Q series MELSECNET/H module cannot be used in combination.
For the method of replacing some remote I/O stations with a Q series module without changing the
remote master station using the A/AnS/QnA/QnAS series, refer to Section 5.2.
(2) Processing time
The link scan time and link refresh time differ between the A/AnS/QnA/QnAS series and the Q series.
For details on processing time, refer to the manual for the respective module.
(3) Interface of remote I/O station
The interface to connect programming tools such as GX Works2 or GX Developer differs between the A/
AnS/QnA/QnAS series and the Q series.
• A/AnS/QnA/QnAS series:RS-422 interface
• Q series:RS-232 interface
When connecting to the Q series, use the following RS-232 cable.
• RS-232 cable: QC30R2
(4) Precautions for replacement of QnA/QnAS series
(a) Parallel master system
The parallel master system cannot be configured in the MELSECNET/H.
Configure two networks.
MELSECNET/10
1PM
R
1R2
1R3
PM Parallel remote master station
R
PSM Parallel remote sub-master station
R
R Remote I/O station
Network No.
Station No.
(b) Multiplex master system
1) MELSECNET/H can establish the system only when mounting on the following CPU.
• Process CPU (Q12PHCPU, Q25PHCPU)
• Redundant CPU (Q12PRHCPU, Q25PRHCPU)
2) For the MELSECNET/H, the multiplexed remote master station and the multiplexed remote sub-
master station cannot be mounted on the same CPU.
Mount the multiplexed remote master station and the multiplexed remote sub-master station on
separate CPUs.
1PSM 1
R
Network No.1
1R5
1R4
MELSECNET/H
1R2 2R4
1M /2M
Network No.2
R R
2R5
1R3
M
Remote master station
R
R
Remote I/O station
Network No.
Station No.
System configuration
precautions
1) Divide into two networks of
which the network No.
differs.
2) Set the station that is not
used after dividing the
network as the reserved
station.
3) Use the inter-link data
transfer function for data
communication between
the remote master stations.
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