P
RO
V
U
™ PD6400 High Voltage & High Current Meter
Instruction Manual
27
Setting the Relay Assignment
(
asSign
)
The relays may be assigned to their the current or
voltage input channels, the apparent power channel
P, or Modbus
®
input.
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. Automatic reset (non-latching)
2. Aut manual reset at any time (non-
latching)
3. Latching (manual reset only, at any time)
4. Latching with Clear (manual reset only after
alarm condition has cleared)
5. Pump alternation control (automatic reset
only, for level applications unrelated to
voltage and current monitoring)
6. Sampling (the relay is activated for a user-
specified time)
7. Off (relay state controlled by Interlock
feature)
The following graphic shows relay 1 action setup;
relay 2-8 are set up in a similar fashion.
Programming Set and Reset
Points
High alarm indication: program set point above reset
point.
Low alarm indication: program set point below reset
point.
The deadband is determined by the difference
between set and reset points. Minimum deadband is
one display count. If the set and reset points are
programmed with the same value, the relay will reset
one count below the set point.
Note: Changes are not saved until the reset point has
been accepted.
Setting Fail-Safe Operation
In fail-safe mode of operation, the relay coil is
energized when the process variable is within safe
limits and the relay coil is de-energized when the
alarm condition exists. The fail-safe operation is set
independently for each relay. Select
on
to enable or
select
off
to disable fail-safe operation.
Programming Time Delay
The
On
and
Off
time delays may be programmed for
each relay between 0 and 999.9 seconds. The relays
will transfer only after the condition has been
maintained for the corresponding time delay.
The
On
time delay is associated with the set point.
The
Off
time delay is associated with the reset point.
