Nor-Cal SDC15 Controller - Manual (Page 64)

• The following describes examples showing how to use the ON/OFF control
action point offset:
To turn OFF the output at 205˚C or more and turn ON the output at less than
190˚C with the heat control and SP = 200˚C, the differential is set to 15˚C and
the offset is set to 5˚C.
To turn OFF the output at 5˚C or less and turn ON the output at more than 10˚C
with the cool control and SP = 10˚C, the differential is set to 5˚C and the offset is
set to -5˚C.
■ PID control
In the fixed PID control or ST (self-tuning), the PID control related items can be
set.
5-14
Chapter 5. DETAILED DESCRIPTION OF EACH FUNCTION
Item (Setting display/bank) Display Contents Initial value User level
P (Proportional band)
(Parameter setup/PID
bank) 0.1 to 999.9% 5.0% Simple,
Standard,
High function
I (Integral time)
(Parameter setup/PID
bank) 120s 0 to 9999s
(No integration control action when set at "0".)
D (Derivative time)
(Parameter setup/PID
bank) 30s 0 to 9999s
(No derivative control action when set at "0".)
Manual reset
(Parameter setup/PID
bank) 50.0% -10.0 to +110.0%
MV low limit
(Parameter setup/PID
bank) -10.0 to +110.0% 0.0% Standard,
High function
MV high limit
(Parameter setup/PID
bank) -10.0 to +110.0% 100.0%
P (Proportional band) (cool)
(Parameter setup/PID
bank) 0.1 to 999.9% 5.0% Simple,
Standard,
High function
I (Integral time) (cool)
(Parameter setup/PID
bank) 0 to 9999s
(No integration control action when set at "0".) 120s
D (Derivative time) (cool)
(Parameter setup/PID
bank) 0 to 9999s
(No derivative control action when set at "0".) 30s
Output low limit (Cool)
(Parameter setup/PID
bank) -10.0 to +110.0% 0.0% Standard,
High function
Output high limit (Cool)
(Parameter setup/PID
bank) -10.0 to +110.0% 100.0%