What may be happening is as follows: Both
of your Citects are I/O Servers with PLCs or DISK PLCs attached.
When you have only one Citect running, all the PLC requests are
being serviced locally and any remote PLC request will fail
immediately because the other I/O Servers are not running. When you
startup both Citects, the first Citect will start getting data from
the second. This will slow the response time down as the request
must now be passed via CiNet from the first Citect to the second
Citect. The CiNet is becoming bogged down and this will slow down
the response time of Citects. You can check to see if this link is
becoming bogged by looking the debug kernel "PAGE DRIVER" and
checking the rate of data transfer over the link. |