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CPU414H

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flinana

flinana

Electrical
Joined
May 21, 2003
Messages
129
Location
SA
Hi,

We have the following setup.

LAN A SCADA with S7 400H and LAN B with the same equipment.

One switch in LANA is connected to a switch in LAN B, this LANB has a FW connected to the switch via two cables.

When i proceeded to connect a third cable betwenn the FW and the switch, the PLCs in LAN A when to stop mode. I honestly cannot understand how this can happen but i would greatly appreciate if anyone can shed a light into this problem.
I have a netwrok diagram and PLC diagnostic if anone needs it to have it clear.


Thanks,
 
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