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LOOP CONTROL
Automatic Tuning Types: Pre-Tune
Proportional Bands: 0 (OFF), 0.5% - 999.9% of input span at
0.1% increments.
Reset (Integral Time
Constant):
1s - 99min 59s and OFF
Rate (Derivative Time
Constant):
0 (OFF) - 99 min 59 s.
Manual Reset (Bias): Added each control algorithm execution.
Adjustable in the range 0 - 100% of output
power (single output) or –100% to +100%
of output power (dual output).
Deadband/Overlap: –20% to +20% of Proportional Band 1 +
Proportional Band 2.
ON/OFF Differential: 0.1% to 10.0% of input span.
Auto/Manual Control: User-selectable with “bumpless” transfer
into and out of Manual Control.
Cycle Times: Selectable from
1
2
s to 512 secs in binary
steps.
Setpoint Range: Limited by Range Maximum and Range
Minimum.
ALARM CONTROL
Maximum Number of
Alarms:
Two “soft” alarms.
Max. No. of Outputs
Available:
Up to two outputs can be utilised for alarm
purposes.
Combinatorial Alarms: Logical OR or AND of alarms to an
individual hardware output is available.
S077-A Volume II A-8