| Diagnostic Alerts & Capabilities • Low pneumatic supply pressure Should supply pressure drop below operational threshold level a local and remote alert will be activated. A shorted or opened solenoid circuit will be identified during operation with a local and remote alert. • Stuck pneumatic spool or pilot valve Should either the pilot poppet or main spool be stuck for any reason (air line contamination, freezing etc.) a local and remote alert will be energized. • Stuck process valve/actuator If the Axiom stalls in mid stroke and no on-board problem sources are identified an alert will be energized locally and remotely that the problem source is located in the valve/actuator assembly. • Remote switch setting Open and Closed limit switch settings may be made with on-board push buttons or remotely through the control system. • Identification "winking" To positively confirm the field device identity the control room may initiate the "wink" function which flashes both open and closed LEDs without affecting valve operational status. Alerts are cleared automatically when normal operating conditions are restored. Control System Interface AS-Interface 2.1 or greater level protocol may be used to interface up to 31 Axiom units into the control system. Communication bits may be mapped into standard DCS or PLC as desired. No special software is required. See StoneL FieldLink program for information about the cost saving benefits and easy installation of the AS-Interface protocol. |