Watlow Series 922 Retrofit - Manual (Page 46)

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WATLOW Series 922 User's Manual How To Program the Series 922, Chapter 6
Programming
Chapter 6
How To Program The Series 922
This chapter enables you to setup the Series 922 quickly and easily. It explains
why it's a good idea to write out your parameter values. Chapter 6 also shows
you flow diagrams of the programming process.
Write Out Your Program
The Watlow Series 922 controls temperature for a specific heating and/or cooling
process. Your setup parameter values, when they're entered, give the Series 922
orders for the work you want it to perform.
Since the amount of information in the setup is extensive, we suggest that you
write the value on a copy of the Master Step Chart on Page 62. This enables you
to program the Series 922 quickly and without mistakes. The chart makes a good
record of your values.
Select the Proper DIP Switch Settings
Prior to programming, and operating the Series 922, you must set the DIP
Switches.
DIP Switch #1 sets a "warm" or "cold" start following power removal from the 922.
With the DIP switch in the OFF position for a "Warm Start", the microprocessor
uses previously programmed information as if power had not been removed. A
Cold Start starts "clean" or completely cleared of all user-programmed information
when the DIP switch is in the ON position. All parameters are empty or set to the
default limits.
DIP Switch #2 in the ON position displays only certain factory selected
SPCLFUNC parameters. Set the DIP Switch in the OFF position to display all
parameters.
DIP Switch #3 selects tenths of units displayed for process inputs.
DIP Switch #4 is ON for 0-5VDC/0-20mA input & OFF for 1-5VDC/4-20mA input.
DIP Switch #5 is not used. Set it to the OFF position.
DIP Switch #6 is for factory test and calibration, it must be OFF.
External Event Input
The event input allows the Series 922 to be programmed to wait at that point in
the profile until a change in status of the event input occurs. It can be pro-
grammed to wait for a switch closure or opening at Terminals 22 and 24 via the
WE (wait for event) step in the WAITFOR menu.
Remote Hold Input
A contact closure across the remote hold input (terminals 22 & 24) causes the
Series 922 to pause until the switch opens. This is indicated by a flashing RUN
LED. While in this condition, the 922 actively maintains the set point and event
output conditions which exist.