Applications Guide Tracer Graphical Programming - Trane

®
Deleting a block
Analyzing this scenario might result in Figure 30. The corresponding
data definition is presented in Table 3, and a wiring diagram is presented
in Figure 11 on page 14.
Figure 30: Modified equipment room exhaust fan data
Table 3: Modified equipment room exhaust fan data definition
Data Type Name Notes
Input Analog Equip Rm Space Temp Universal input configured as thermistor or
RTD (Balco, Platinum)
Output Binary Equip Rm Fan On/Off Set minimum on/off times to 2 minutes.
Variables Analog Equip Rm Temp Setpoint Analog variable, source set to operator
display/service tool
Binary Equip Rm Alarm Binary variable, source set to program
Before you actually start to write the program, verify that these inputs,
outputs, and variables are configured in your Tracer MP580/581. For
more information, see the Tracer MP580/581 Programmable Controller
Programming guide (CNT-SVP01A-EN).
Deleting a block
In the Equip Room Exhaust Fan program, you used the Greater Than
blocktocomparethespacetemperatureandthetemperaturesetpoint.
Now you do not want to just compare the space temperature to the setpoint;
you want to incorporate a deadband. A 5-degree deadband will
keep the fan from cycling on and off as the space temperature fluctuates
around 85ºF. The fan should stay on until the space temperature falls
below 80ºF. Replace the Greater Than block with a Deadband block.
To delete a block:
1. Click on the Greater Than block. The block is outlined in yellow.
CNT-APG001-EN 31