Watlow Series 922 User's Manual - Heaters Sensors Controls

SETUP MenuA2L ( )RETURNACCESS (1)PIDCH1PB1H ( )RS1H ( )RT1H ( )CT1H ( )RB1H ( )The low process alarm or low deviation alarm for Output 2 of the Series 922.Displayed only when AUX2 = AL and an external event board is present.ALTYP2 parameter selects a process or deviation alarm. This parameter willnot appear if TYP, under the SPCLFUNC menu, is set to "T" (Temperature forChannel 1 only) or "P" (Process for Channel 1 only).Process Range: R2L to R2H (R2L -10% to R2H +10%)Process Default: R2L (R2L -10%)Deviation Range: -R2H (or -555°C / -55.5°C / -999°F/U / -99.9 F/U) to 0Deviation Default: Low end valueFrom RETURN, you can go back to the SYSTEM prompt by pressing theENTER key, or return to ACCESS ( 0 ) menu by pressing the MODE key.In the SETUP menu, ACCESS ( 1 ) must be selected to enter the PIDparameters.When ACCESS (1) is entered under the SETUP menu of the Series 922, thePID parameters will appear. These parameters consist of Proportional,Integral (auto reset), and Derivative (rate) actions. Choose between CH1 orCH2 (Channel 1, Channel 2). If "T" or "P" have been entered in the TYPparameter under the SPCLFUNC menu, Channel 2 will not appear.Range: CH1 - CH2 Default: CH1A proportional temperature band expressed in degrees, within which atemperature controller proportioning function is active for Channel 1 heating.Expressed in degrees.Range: 0 to 900°F / 0 to 500°C / 0 to 500 Units; 0.0 to 90.0°F / 0.0 to 50.0°C/ 0.0 to 50.0 Units.Default: 45°F / 25°C / 25 Units; 4.5°F / 2.5°C / 2.5 UnitsA reset (integral) heating control action for Channel 1 that automaticallyeliminates offset, or "droop," between set point and actual process temperaturein a proportional control. Expressed by repeats per minute. This parameterwill not appear if PB1H is set to 0.Range: 0.00 to 5.00 repeats/minuteDefault: 0.00The rate (derivative) heating function for Channel 1 of the Series 922. Therate is determined by how fast the error being corrected is increasing. Expressedin minutes. This parameter will not appear if PB1H is set to 0.Range: 0.00 to 5.00 minutesDefault: 0.00The Channel 1 heating cycle time usually expressed in seconds for a controllerto complete one ON/OFF cycle. Time between successive turn ons. Thisparameter will not appear if: Your Series 922 has a 4-20mA output and OUT1under the SPCLFUNC menu is set to HTCL, or PB1H is set to 0.Range: 1 to 60 secondsDefault: 5A thermal control band for Channel 1 heating, that defines where the rate(derivative) function begins. This band is in multiples of the heat proportionalband. This parameter will not appear if PB1H is set to 0.Range: 0 to 7 times the PB1H, (0 denotes rate is always functional.)Default: 050 WATLOW Series 922 User's Manual How To Program the Series 922, Chapter 6