Hello,I'm trying to use a CND function block to monitor communications from our terminal servers for an interlock.We have a module that will output a permissive boolean to another site and we need an interlock to be active to ensure it will turn off if for some reason the control room workstations fail because of a terminal server communications fault.I've tried '//RTS-01/COMM_ALM.LAALM' > 0 in the expression, but when we tested it we got a readback fail due to RTS-01 being offline (we did a normal shutdown to test). I'm seeing that comm fail alarm present in the operator interface and in our node status window as active but it is not tripping the interlock. I've tried using the .ST field < 128 with an OR statement. And even though Control Studio online shows the Status field check as true it still won't trigger the interlock.The module we're using is assigned to an ICP not to RTS-01 and we were monitoring from the DELTAVPRO server.Does anyone know of another location for the node comm alarm parameter that I can point the expression at to achieve the results I'm looking for? It seems that the system alarms are handled in AREA_A but I can't get to anything in there alarm-wise.Side note: I did find the parameter the node status window points to in iFix but it doesn't translate to the expression assistant in CSO. "DVSYS.THISUSER/NODES[@index1@].F_STATUS = 2" = node is not communicating.Thanks in advance.