Omron WS02-SIMC1-E - V1.9 REV 12-2009 Operation Manual page 168

Serial Communications Connection
When Serial Communications on the CX-Simulator Become Disabled
When Serial Communications on the CX-Simulator become disabled, for
example, when the RS-232C Port Error Flag (A39204) in the Auxiliary area
turns ON while executing serial communications on the CX-Simulator, either
press [Reset] button in the [Debug Console], or once [Disconnect] and then
[Connect] again.
Section 5-3
129