Applies To:
  • CitectSCADA 1.00, 1.01, 1.10, 1.11, 1.20, 2.00, 2.01

Question. Can you place two TIWAY PC cards on the same TIWAY network cable? 

You cannot place two TIWAY PC cards on the same network cable. The TIWAY network is a single master system - it does not allow more than one master on the same network. If you start a second Citect computer when using two TIWAY cards on the same cable, both the new Citect computer, and the first Citect will fail. The correct method with more than one TIWAY card is to run a second TIWAY network and put a second NIM in each of your PLCs.

The TIWAY network does support a master and slave configuration that should allow for multi cards on the same network. Citect has investigated supporting this configuration, however we have found that this configuration is highly unstable. So we have decided not support this configuration.

See also Q1147