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MELSEC-Q
7 APPLICATION FUNCTIONS
7.10.3 Pairing setting in a redundant system
A redundant system consists of a control system and a standby system.
In pairing setting, set a combination of the station numbers of the network modules
making up the redundant system.
When there is a redundant system in the network, the pairing setting must be done
with the common parameters of the control station
*1
.
*2
*1: For the control station, use a network module of function version D or later.
*2: Make the pairing setting using GX Developer of version 8.18U or later.
(1) Setting items
Make settings in "Pairing" on the "Network Range Assignment" screen with
careful consideration for the following points:
1) Set numbers of two adjoining stations as a pair. The station with the smaller
station number can be set to either redundant CPU of system A or B.
2) The last station number and station No. 1 (example: station Nos. 64 and 1)
cannot be paired.
3) Confirm that the stations to be paired are installed with redundant CPUs.
If either of the paired stations has a QCPU other than the redundant CPU, an
error will occur in the CPU module.
POINT
Before pairing setting, confirm the station numbers of the network modules.
If the contents of pairing setting do not match the actual combination of the station
numbers of the network modules, a receive data error will occur when the power is
turned on or at the time of system switching.
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