Watlow 12LS Controller - Manual (Page 97)

5-6
5.2.6 GENERAL PID CONSTANTS BY APPLICATION
PROPORTIONAL BAND ONLY (P)
PB = SET 7% of SP Example: SP = 450 PB = 31
TI = OFF
TD = OFF
Output Filter = 0
P with INTEGRAL (PI)
PB = Set 10% of SP Example: SP = 450 PB = 45
TI = 60
TD = OFF
Output Filter = 2
PI with DERIVATIVE (PID)
PB = Set 10% of SP Example SP = 450 PB = 45
TI = 60
TD = Set 15% of TI Example TI = 60 TD = 9
Output Filter = 2
ABOVE VALUES HAVE BEEN USED FOR MANY APPLICATIONS AND IN GENERAL
WILL BE USEFUL IF NOT FOR CONTROL THEN FOR A STARTING POINT FOR
TUNING THE PID. NOTE! CONTROL MUST BE IN AUTO.
GENERAL PID CONSTANTS BY APPLICATION
|-------------------------------------------------------------|
¦ ¦ PB TI TD FIL OUTPUT CT ACT ¦
¦ |---------------------------------------¦
¦ ELECTRIC HEAT W/ ¦ 50 ¦ 60 ¦ 15 ¦ 4 ¦ TP ¦ 3 ¦ REV ¦
¦ SOLID STATE RELAYS ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
¦ ELECTRIC HEAT W/ ¦ 50 ¦ 60 ¦ 15 ¦ 6 ¦ TP ¦ 20 ¦ REV ¦
¦ MECHANICAL RELAYS ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
¦ GAS HEAT WITH ¦ 60 ¦ 120¦ 25 ¦ 8 ¦ ANA ¦ NA ¦ REV ¦
¦ MOTORIZED VALVES ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
¦ GAS HEAT SP>1200 ¦ 100¦ 240¦ 40 ¦ 8 ¦ ANA ¦ NA ¦ REV ¦
¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
¦ EXTRUDERS W/COOLING ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
¦ HEAT W/SSR ¦ 50 ¦ 300¦ 90 ¦ 8 ¦ TP ¦ 3 ¦ REV ¦
¦ SET SPREAD TO 0 ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
¦ COOLW/SOLENOID VALVE¦ 10 ¦ OFF¦ OFF¦ 4 ¦ TP ¦ 20 ¦ DIR ¦
¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
¦ COOLW/FANS ¦ 10 ¦ OFF¦ OFF¦ 4 ¦ TP ¦ 60 ¦ DIR ¦
¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
¦ ELECTRIC HEAT W/ ¦ 30 ¦ 20 ¦ OFF¦ 4 ¦ DZC ¦ NA ¦ REV ¦
¦ OPEN HEAT COILS ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
¦ ELECTRIC HEAT W/ ¦ 60 ¦ 60 ¦ 15 ¦ 4 ¦ ANA ¦ NA ¦ REV ¦
¦ SCR CONTROLLERS ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
|-------------------------------------------------------------|