5.29
Relay PI control duty cycle
Section:
AL 1
to
AL 8
Display:
dutY SECS
Range:
0
to
6553.5
secs
Default Value:
10.0
Default Access Level
4
Function number
4270
to
4277
Allows the relay PI control duty cycle to be set, refer to “Setting up the relay PI control” chapter in the Addendum
booklet.
5.30
Relay PI frequency control “on” time
Section:
AL 1
to
AL 8
Display:
on SECS
Range:
0
to
6553.5
secs
Default Value:
1.0
Default Access Level
4
Function number
4280
to
4287
Allows the relay PI frequency control “on” time to be set, refer to “Setting up the relay PI control” chapter in the
Addendum booklet.
5.31
Alarm relay normally open/closed
Section:
RL 1
to
RL 8
Display:
RLY
Range:
n.o
,
n.c
Default Value:
n.o
Default Access Level
4
Function number
4030
to
4037
Displays and sets the setpoint alarm relay x action to normally open (de-energised) or normally closed (energised),
when no alarm condition is present. Since the relay will always open when power is removed a normally closed
alarm is often used to provide a power failure alarm indication. To set the alarm relay for normally open or closed
go to the
RL1
to
RL8 RLY
function and use the
^
or
v
push buttons to set the required operation then press
F
to accept this selection. Example:
If set to
A1n.o
alarm relay 1 will be open circuit when the display is outside alarm condition and will be closed
(short circuit across COM and N/O terminals) when the display is in alarm condition.
5.32
Relay acknowledge
Section:
RL 1
to
RL 8
Display:
Ack
Range:
OFF
or
ON
Default Value:
OFF
Default Access Level
4
Function number
4320
to
4327
If an alarm has been set to latching operation it will not reset until the reading is outside its alarm condition and the
operator has acknowledged the alarm by pressing the
F
button (where fitted) or when programmed for this purpose
using a
P
button or remote input to acknowledge the alarm. If the
Ack
is set to
ON
the operator can acknowledge
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