Watlow Series 922 Retrofit - Manual (Page 61)

How To Program the Series 922, Chapter 6 53 WATLOW Series 922 User's Manual
The cooling cycle time for Channel 2 expressed in seconds for a controller 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 OUT2
under the SPCLFUNC menu is set to CLHT, PB2C is set to 0, or "T" or "P"
(Channel 1 only) in the TYP parameter under the SPCLFUNC menu has been
selected.
Range: 1 to 60 seconds
Default: 5
A thermal control band for Channel 2 cooling that defines where the rate
(derivative) function begins. This band is in multiples of the cool proportional
band. This parameter will not appear if PB2C is set to 0, or "T" or "P" (Channel
1 only) in the TYP parameter under the SPCLFUNC menu has been selected.
Range: 0 to 7 times the PB2C (0 denotes rate is always functional)
Default: 0
From any RETURN, you can go back to the SYSTEM prompt by pressing the
ENTER key, or return to PID by pressing the MODE key.
In the SETUP menu, ACCESS (3) must be selected to enter the DIAGNOS
parameters. Here you can manually adjust percent power for Channel 1 and 2.
When ACCESS (3) is selected under the SETUP mode of the Series 922, the
DIAGNOS parameters appear. The outputs will revert to (open loop) manual
percent power control at the percent of power that they happen to be at before
entering the DIAGNOS menu. The control will revert back to a closed loop
control when you leave the DIAGNOS menu.
Allows the operator to manually adjust the percent power output for Channel 1.
If set to 100, the heat output for Channel 1 is full ON.
Range: -100 to 100
Default: % power unit was at when DIAGNOS was entered.
Allows the operator to manually adjust the percent power output for Channel 2.
This parameter will not appear if the TYP prompt has been set to "T" (Tem-
perature for Channel 1 only) or "P" (Process for Channel 1 only). If set to 100,
the heat output for Channel 2 is full ON.
Range: -100 to 100
Default: % power unit was at when DIAGNOS was entered.
Channel 2 ACTUAL temperature/humidity.
Range: R2L to R2H
Default: Unprogrammed
From RETURN, you can go back to the SYSTEM prompt by pressing the
ENTER key, or return to ACCESS (3) menu by pressing the MODE key.
In the SETUP menu, ACCESS (5) must be selected to enter the SPCLFUNC
parameters.
When ACCESS (5) is selected under the SETUP mode of the Series 922, the
Special Function (SPCLFUNC) parameters appear. Here you can select the
degrees, output type, auxiliary, and alarm types among others.
Accepts the sensor input and scales it to degrees Celsius, Fahrenheit, or Units
of measure depending on the input type selected and the C/F/U selection
made. This prompt will not appear if DIP switch #2 is ON. Changing this
parameter defaults parameters SP1, A1L, A1H, and clears all files.
Range: C, F, or U
Default: F
SETUP Menu
C/F/U ( )
C2/RH ( )
MAN2 ( )
CT2C ( )
RB2C ( )
RETURN
ACCESS(3 )
DIAGNOS
MAN1 ( )
RETURN
SPCLFUNC
ACCESS(5 )