Omega C9000A SERIES User Manual

65
1 Run Autotune AT: with cooling
disabled (Function .19 Option 0). Set Function .4
normal operating temp. Accept AT Option 15
proportional cycle time
5.8.3 Setting Up Routine for Heat-Cool Control
Tem p er ature
setpoint
e.g. 50% cool
no offset
e.g. 30% heat
Time
Cool
prop band
(offset without
cool strategy
integral action)
consistent
deadband/
overlap
exothermic
change in
load causes
integral to
move prop
bands down
Integral
causes prop
bands to
move
Figure 5-9. Cool Strategy
1. Integral causes linked prop bands to move up.
2. Stabilizes eg. 30% heat.
3. Exothermic load change causes integral to move prop bands
down minimizing and disturbance.
4. Minimum offset achieved (4a = offset without cool strategy
integral action).
5. Stabilizes eg. 50% cool.
6. Consistent dead band/overlap throughout.
STEP ACTION PARAMETER
NOTE
SP1 cycle time must be compatible with switching
devices used (SP2 cool output is OFF)

Omega C9000A SERIES Specifications

General

Brand	Omega
Model	C9000A SERIES
Category	Temperature Controller
Language	English