Can anyone explain what the difference is between an 'Interlock' and a 'Force' within a PCSD Valve module?
In reply to Stuart Jolley:
Pre PCSD v13 the valve module did have these composites (replaced by EDC at V13) Intelocks in pre v13 PCSD valve modules always trip and hold the valve to/in the passive state (state 0) Permissives prevent the valve moving away from the passive, but wouldn’t trip to passive if already in an active state. Force SP allow a particular state (passive/active 1 or active 2) to be driven under certain conditions, force SP would be used for simple control functions rather than protection functions (as for Interlocks and permissives). E.g in a drain sump opening an outlet valve on high level and closing a valve om low level.
In reply to IntuitiveNeil:
In reply to Matt Stoner: