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Operating Procedures
Module I/O Screens
Data is collected by sensors as either analog or digital
signals and displayed on the IO Status screens.
When the module screen is displayed, pressing the I/O
button displays the I/O menu.
The I/O menu is comprised of four screens. Both primary
and secondary modules have analog I/O (analog input and
analog output) and digital I/O (digital input and digital
Table 11. Analog and digital input/output screens
MWC – Primary/Secondary Analog I/O Screen
WXM – Primary/Secondary Analog I/O Screen
When an I/O screen is displayed, switching to other I/O
screens is accomplished by pressing their respective
buttons:
•
The ANALOG button displays the analog screen.
•
The DIGITAL button displays the digital screen.
Digital LEDs
There is an LED for each digital input that indicates its
current state. For all inputs, the color of the LED signifies its
current state:
Green LED — This input is energized; the connected
device is closed.
Gray LED — This input is de-energized; the connected
device is open.
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output). The third screen, Expansion #1, applies to the
primary and secondary module. The fourth screen,
Expansion #2, applies only to the primary module.
MWC – Primary/Secondary Digital I/O Screen
WXM – Primary/Secondary Digital I/O Screen
MWC Analog Inputs
Analog input (AI) data includes these parameters:
AI1
This input indicates Suction Pressure Circuit 1.
AI2
This input indicates Discharge Pressure Circuit 1.
AI3, AI4
These inputs indicate the evaporator inlet or outlet
temperatures.
AI5, AI6
These inputs indicate the condenser inlet or outlet
temperatures.
ARTC-SVX010A-EN
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