Held

The Held status bit is enabled by the control system for all phases that have been put on hold either by the Batch Management System or if a critical alarm occurs. Generally, the phase logic freezes the current operation in progress and places the block in the Held state. However, the actual operation of the phase logic while in the Held state is application specific. When the Held status bit is enabled, none of the remaining phase status bits can be set. Finally, the Batch Management System cannot send a request to restart or abort a phase block unless the phase block status is in the Held state.