Watlow Series 920 Microprocessor-Based Ramping Control - Manual (Page 36)

Chapter 6
How To Program The Series 920
This chapter will enable you to set up the Series 920 quickly and easily. It will
explain 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 920 controls temperature for a specific heating and/or cooling
process. Your setup parameter values, when they’re entered, give the Series 920
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 53. This will enable you to set
up the Series 920 quickly and without mistakes. The chart makes a good record of
your values.
Programming in General
Programming the Series 920 is easy as 1 - 2 - 3:
1. Use the MODE key to select the alphanumeric display prompt you want.
2. Use the UP/DOWN keys to select data or prompts in the alphanumeric display.
3. Press ENTER.
Select the Proper DIP Switch Settings
Prior to programming and operating the Series 920, you must set the DIP Switches.
DIP Switch #1 sets a “warm” or “cold” start following power removal from the 920.
With the DIP switch in the OFF position for a “Warm Start”, the micro-processor 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 will be empty or set to the default limits.
DIP switch #2 is not used. Set it to the OFF position.
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 for units with output. If you have this unit, set #5 to the ON
position.
DIP switch # 6 determines whether the front panel LED’s to the right of the actual
display are load indicators or indicators. When OFF, the LEDs are °F/°C
indicators.
DIP switch #7, when OFF, displays all SPCLFUNC parameters. When ON, only
factory selected parameters are displayed.
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DIP switch #8 is for factory test and calibration, it must be OFF.
WATLOW Series 920 User’s Manual How To Program the Series 920, Chapter 6