Manual i/o test, Digital input testing, Digital output selection – Watlow CAS User Manual
Page 75
Setup
CAS User’s Guide 65
Manual I/O Test
Press Yes at this prompt to see menus which can help you test the digital
inputs, digital outputs and the CAS' keypad.
Digital Input Testing
This is a read-only menu that shows the logic state of the 8 digital inputs
as H (High- the input is at 5 volts or is not connected) or L (Low- the
input is at zero volts). Inputs 1 to 8 are displayed from left to right.
Since inputs are pulled High when they are not connected, test an input
by shorting it to controller common and making sure this menu shows
the correct state for that input.
Digital Output Selection
This menu lets you select one of the digital alarm outputs to test in the
next menu.
CHANNEL PROCESS UNITS
CHANNEL NAME ALARM STATUS
MANUAL I/O
TEST ?
CHANNEL PROCESS UNITS
CHANNEL NAME ALARM STATUS
DIGITAL INPUTS
HHLLHHHH
CHANNEL PROCESS UNITS
CHANNEL NAME ALARM STATUS
TEST DIGITAL
OUTPUT ? 34
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