Any consequence of changing CC-Link IE Network Number??

[Aoto10]

Is there any negative result of changing CC-Link IE network number on an established working machine? Referring to the attached image is the actual machine network I am dealing with. The network I want to change is the purple Network #3. The reason is because we use wireless LAN to access all PLCs in the plant through a central PLC on the Red network #7. Currently, I do not have network access to any PLC on the purple network 3. The black box is showing a single PLC rack with two CC-Link IE network cards mounted. The red Network #7 is connected to the central PLC. But the central PLC already has a network #3 in use so I cannot create a routing table for my target network. I would like to change the purple Network #3 to something like Network #40 so I can create a routing table in the central PLC to get me network access to all stations. 

Are there any ladder functions that may reference a network Number? The "Start I/O No." will not change.

Edited November 14, 2022 by Aoto10

[d4rkm4n]

I believe you need to check all PLC/HMI, see if any of them if connected/referring to network #3.

If I'm not mistaken, you could check at CC Link configuration, maybe for IO mapping.

Btw, which model of PLC?

[Gambit]

There ares some dedicated instrcution which use network number referencing. also you can use variables like Jxx\G were xx is the network number

[Aoto10]

11 hours ago, d4rkm4n said:

I believe you need to check all PLC/HMI, see if any of them if connected/referring to network #3.

If I'm not mistaken, you could check at CC Link configuration, maybe for IO mapping.

Btw, which model of PLC?

To my knowledge all GOT's only connect to their local PLC so I see no issue there.

I checked the module setup in GX works and I can't find any reference to any other network. There is refresh parameters but I'm not changing the station number so I see no issue?

All PLCs are QCPU of varying models using QJ71GF11-T2 CC IE modules 

[Aoto10]

6 hours ago, Gambit said:

There ares some dedicated instrcution which use network number referencing. also you can use variables like Jxx\G were xx is the network number

I looked through the QJ71GF11-T2 manual and seen the dedicated instructions you mentioned. For example, the JP.READ instruction uses Jn to indicate " Own station's network No.". Wouldn't this be the network number on that local PLC and the routing parameters would be used to access a remote target network?

[Aoto10]

Update on this. I did end up changing the machine network to 40 and so far, have noticed no issues. Hope this helps someone one day.