Watlow Series 922 - Manual (Page 50)

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WATLOW Series 922 User's Manual How To Program the Series 922, Chapter 6
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 will
not appear if TYP, under the SPCLFUNC menu, is set to "T" (Temperature for
Channel 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 0
Deviation Default: Low end value
From RETURN, you can go back to the SYSTEM prompt by pressing the
ENTER key, or return to ACCESS ( 0 ) menu by pressing the MODE key.
In the SETUP menu, ACCESS ( 1 ) must be selected to enter the PID
parameters.
When ACCESS (1) is entered under the SETUP menu of the Series 922, the
PID parameters will appear. These parameters consist of Proportional,
Integral (auto reset), and Derivative (rate) actions. Choose between CH1 or
CH2 (Channel 1, Channel 2). If "T" or "P" have been entered in the TYP
parameter under the SPCLFUNC menu, Channel 2 will not appear.
Range: CH1 - CH2
Default: CH1
A proportional temperature band expressed in degrees, within which a
temperature 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 Units
A reset (integral) heating control action for Channel 1 that automatically
eliminates offset, or "droop," between set point and actual process tempera-
ture in a proportional control. Expressed by repeats per minute. This parame-
ter will not appear if PB1H is set to 0.
Range: 0.00 to 5.00 repeats/minute
Default: 0.00
The rate (derivative) heating function for Channel 1 of the Series 922. The
rate is determined by how fast the error being corrected is increasing. Ex-
pressed in minutes. This parameter will not appear if PB1H is set to 0.
Range: 0.00 to 5.00 minutes
Default: 0.00
The Channel 1 heating cycle time usually expressed in seconds for a control-
ler to complete one ON/OFF cycle. Time between successive turn ons. This
parameter will not appear if: Your Series 922 has a 4-20mA output and OUT1
under the SPCLFUNC menu is set to HTCL, or PB1H is set to 0.
Range: 1 to 60 seconds
Default: 5
A thermal control band for Channel 1 heating, that defines where the rate
(derivative) function begins. This band is in multiples of the heat proportional
band. 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: 0
SETUP Menu
RS1H ( )
RT1H ( )
CT1H ( )
RB1H ( )
A2L ( )
RETURN
PB1H ( )
ACCESS (1)
PID
CH1