Precision Digital PD6310 - Manual (Page 57)

Model PD6210 & PD6310 Batch Controllers Instruction Manual
57
Setting the Relay Action
Operation of the relays is programmed in the Action menu. The relays
are commonly set up for any of the following modes of operation:
1. Always set to Auto for Batch control operation. Also for automatic
reset (non-latching) of alarms.
2. Sampling (the relay is activated for a user-specified time)
3. Off (relay state controlled by Interlock feature)
In addition, the following relay actions may be programmed. These
actions are not appropriate for batch control applications, but may be
used then the controller is in other applications.
4. Automatic + manual reset when not in a batch process (non-
latching)
5. Latching (manual reset only, when not in a batch process)
6. Latching with Clear (manual reset only when not in a batch process
after alarm condition has cleared)
7. Pump alternation control (automatic reset only, for level applications,
unrelated to batch control.)
Setting Batch Control Relays
Operation of batch control relays are programmed in the Assign menu by
selecting total as the assignment. Relays set to total beyond the first
will include a preclose parameter (precls) option. Selecting yes for
precls
will enable multi-stage batching with preclose, and the valve will
close prior to the end of the batch at volume equal to the preset value
minus the preclose amount entered. Selecting no for precls will have
the relay perform identically to the first batch control relay set to total.