Explanation of Functions
5.1
PI relay control setpoint
Display:
A
x.
SP
Range:
Any display value
Default Value:
0
The control setpoint is set to the value in displayed engineering units required for the control
process. The controller will attempt to vary the control output to keep the process variable at the
setpoint. Note that the control setpoint value can be reached and adjusted via the “easy access”
mode (see “Explanation of functions” chapter) if the
ACCS
function is set to
EASY
. This feature
could be useful if the setpoint is to be frequently changed.
Process above
setpoint
Process below
setpoint
Process at
setpoint
SETPOINT
PROCESS
TIME
5.2
Alarm relay low setpoint
Display:
A
x
Lo
Range:
Any display value or
OFF
Default Value:
OFF
Displays and sets the low setpoint value for the designated alarm relay
x
. Note
x
will be replaced
by the relay number when displayed e.g.
A1Lo
for relay 1. Use this low setpoint function if a
relay operation is required when the display value becomes equal to or less than the low setpoint
value. To set a low alarm value go to the
A
x
Lo
function and use the
^
or
v
push buttons to set
the value required then press
F
to accept this value. The low alarm setpoint may be disabled by
pressing the
^
and
v
push buttons simultaneously. When the alarm is disabled the display will
indicate
OFF
. If the relay is allocated both a low and high setpoint then the relay will activate
when the value displayed moves outside the band set by the low and high setpoints. The value at
which the relay will reset is controlled by the
A
x
HY
function.
Example:
If
A1Lo
is set to
10
then relay 1 will activate when the display value is 10 or less.
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Summary of Contents for RM4-IV
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