12LS Controller Installation and Operation Manual, Rev 3 ... - Watlow

5.2.5 PID TUNING CONSTANTSPROPORTIONAL BAND SETTINGSTHE FOLLOWING TABLE REPRESENTS AN AVERAGE SETTING FOR THE PB INRELATIONSHIP TO THE SETPOINT OF THE CONTROLLER WITH A TEMPERATUREINPUT:TEMPERATURE PB TEMPERATURE PBSETPOINTSETPOINT-100 TO +100 20 1600 TO 1699 100+100 TO +199 20 1700 TO 1799 105200 TO 299 30 1800 TO 1899 110300 TO 399 35 1900 TO 1999 120400 TO 499 40 2000 TO 2099 125500 TO 599 45 2100 TO 2199 130600 TO 699 50 2200 TO 2299 135700 TO 799 55 2300 TO 2399 140800 TO 899 60 2400 TO 2499 145900 TO 999 65 2500 TO 2599 1501000 TO 1099 70 2600 TO 2699 1551100 TO 1199 75 2700 TO 2799 1601200 TO 1299 80 2800 TO 2899 1651300 TO 1399 85 2900 TO 2999 1701400 TO 1499 90 3000 TO 3099 1751500 TO 1599 95 3100 TO 3199 180As a general rule use 10% of the SP below 1000 and 5% above 1000 for a starting point insetting the PB.INTEGRAL (TI) VERSUS RESET REPEATS/MINUTE (R/M)RESET R/M = 60/TITI (SEC.) R/M TI (SEC.) R/M TI (SEC.) R/M30 2.0 150 .40 300 .2045 1.3 180 .33 400 .1560 1.0 210 .28 500 .1290 .66 240 .25 600 .10120 .50 270 .22As a general rule use 60, 120, 180, or 240 for TI.DERIVATIVE (TD) VERSUS RATE MINUTES (RM)RATE = TD/60TD (SEC.) RM TD (SEC.) RM TD (SEC.) RM TD (SEC.) RM5 .08 20 .33 35 .58 50 .8310 .16 25 .41 40 .66 55 .9115 .25 30 .50 45 .75 60 1.0As a general rule set TD to be 15% of TI.5-5