Honeywell DCP 50, Product Manual

Page: 32 / 98

NOTES
1. Not operative if Proportional Band = 0.
2. Switching differential for ON/OFF control output.
3. Optional; only one legend will appear for each alarm.
4. Only applicable if a DC linear input is fitted.
5. Only applicable if Output 2 is fitted as a secondary control (COOL)
output.
6. Applicable only if the Communications Option is fitted.
7. When a program is running, respective to program setpoint.
4.1 PARAMETER DETAILS
4-3
Parameter Function Adjustment Range Default value
Input Filter Time
Constant
Filter removes extraneous impulses from
the process variable input
OFF, 0.5 to 100.0
seconds in 0.5 second
increments
2.0 seconds
Process Variable
Offset
Modifies actual process variable (PV)
value:
Offset PV + actual PV
= PV value used
±
input span of
Controller
0
Output Power 1 Current Output 1 power level 0 to 100% Read only
Output Power 2 Current Output 2 power level 0 to 100% Read only
Proportional
Band 1 (PB1)
Portion of input span in which Output 1
power level is proportional to the
(offset) process variable value (see
Figure 4-1).
0.0 to 999.9% of input
span
10.0%
Proportional
Band 2 (PB2)
Portion of input span in which Output 2
power level is proportional to the
(offset) process variable value (see
Figure 4-1).
0.0 to 999.9% of input
span
10.0%
Reset (Integral
Time Constant)
Integral time constant 1sec. to 99min. 59
secs. and OFF
5 mins. 00
secs.
Rate (Derivative
Time Constant)
Derivative time constant 00 secs. to 99 mins. 59
secs.
1 min. 15
secs.
Overlap/
Deadband
Portion of proportional band (PB1 +
PB2) in which both outputs are active
(overlap) or neither output is active
(deadband) - see Figure 4-1).
−
20% to +20% of
(Proportional Band 1 +
Proportional Band 2)
0%
Manual Reset
(Bias)
Bias applied to output power,
expressed as a percentage of output
power.
0% to 100% (Output 1
only);
− 100% to +100%
(Output 1 & Output 2)
25%