Helios Large Display Analog Input Batch Controller Instruction Manual
PD2-6210
40
Relay Assignment (
Assign
)
The relays can be assigned to any of the following parameters:
1. Rate for low or high alarm indication
2. Total for alarm indication
3. Grand total for alarm indication
4. Modbus input
Note: Relay 1 should always be assigned
to “total” for batch control applications.
Setting the Relay Action
Operation of the relays is programmed in the
Action
menu.
The relays may be 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. Aut 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.)
The following graphic shows relay 1 action setup; relay 2-4 are set up in a similar fashion.
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
.
Assign preclose
if multiple relays
are assigned.
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