Operating Procedures
ARTC-SVX005A-EN 39
• Demand Hot / Cold - This is the local cooling and
heating demand value in terms of the number of
requested compressors.
• Temp Diff + - This is the temperature control
differential above the set point or positive dead band.
• Temp Diff - - This is the temperature control
differential below the set point or negative dead band.
Together, both of differentials define the temperature
control dead band.
• Temp Stage-Up Delay - When a compressor has
been staged up, this delay must elapse before the next
compressor can stage up.
• Temp Stage-Down Delay - When a compressor has
been staged down, this delay must elapse before the
next compressor can stage down.
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 for Master
Module and three screens for Slave Module.
Both master and slave modules have Analog I/O (analog
input and analog output), Digital I/O (digital input and
digital output), and Expansion #2 I/O screens. The fourth
screen Expansion #1 I/O applies to master module only.
Table 8. Module input/output screens
Master I/O Analog Screen
Slave I/O Analog Screen
Master I/O Digital Screen
Slave I/O Digital Screen
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