Precision Digital PD6310 - Manual (Page 58)

Model PD6210 & PD6310 Batch Controllers Instruction Manual
58
Front Panel LEDs
The LEDs on the front panel provide status indication for the following:
LED Status LED Status
1 Alarm 1 5 Alarm 5
2 Alarm 2 6 Alarm 6
3 Alarm 3 7 Alarm 7
4 Alarm 4 8 Alarm 8
The controller is supplied with four alarm points that include front panel
LEDs to indicate alarm conditions. This standard feature is particularly
useful for alarm applications that require visual-only indication. The LEDs
are controlled by the set and reset points programmed by the user.
When the display reaches a set point for a high or low alarm, the corres-
ponding alarm LED will turn on. When the display returns to the reset
point the LED will go off. Note that rate alarms are only enabled during a
batching process, and deactivate when the processes is stopped.
Latching relays, or relays with manual reset, are not recommended when
using this controller for batch control, as the manual reset will not be
acknowledged during a batch process, when the rate alarms are active.
For information on latching and manual reset alarms, see the PD6200
and PD6300 instruction manuals available at www.predig.com.
Automatic Reset (Auto)
Automatic reset only
Condition LED Relay
Normal Off Off
Alarm On On
Ack (No effect) On On
Normal Off Off
In this application, the controller is set up for automatic reset (non-
latching relay). Acknowledging the alarm while it is still present has no
effect on either the LED or the relay. When the alarm finally goes away,
the relay automatically resets and the LED also goes off.
Pump Alternation Control
Pump alternation control is not recommended when using this controller
for batch control, as it is used only in level applications, and not with rate,
total, or batching applications. For information on using pump alternation
control for level, see the PD6200 and PD6300 instruction manuals avail-
able at www.predig.com.