Applications Guide Tracer Graphical Programming - Trane
Applications Guide Tracer Graphical Programming - Trane Applications Guide Tracer Graphical Programming - Trane
® Summary-question answers Figure 201: Cooling valve override Figure 202: Heating valve control with override Theheatingvalveworksthesameway,butthereisenoughspacein the heating valve module to add the override implementation on the same page (Figure 202). 3. To accomplish the same alarm reset functionality, you must do a combination of configuration and programming in the Tracer MP580/581 controller and at the Tracer Summit workstation. First, configure a binary variable to communicate the alarm reset value from the Tracer Summit system. One minor change is required to the alarms program. Add a binary variable to the manual reset alarm logic of the alarms program, as shown in Figure 203 on page 247. 246 CNT-APG001-EN
® Chapter 8, “Constant-volume AHU with warm-up, pre-cool, and communica- Figure 203: Modified manual reset alarm logic In Tracer Summit software, create a binary output to represent the alarm reset at the system level. In the Tracer MP580/581 editor, reference the desired binary variable to the newly created binary output. For instance, if the first Tracer Summit binary variable in the Tracer MP580/581 controller is configured as Alarm Reset (BAS) and you created a binary output in Tracer Summit called AHU Alarm Reset, reference the binary variable to the present value of the binary output in Tracer Summit. The operator uses this binary output to turn on the alarm reset. Then write a CPL program to automatically turn the alarm reset off. The following CPL program has an execution frequency of 10 seconds and turns off the alarm reset after 1 minute, allowing sufficient time forittobecommunicatedtotheTracerMP580/581controller. CNT-APG001-EN 247
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®<br />
Summary-question answers<br />
Figure 201: Cooling valve override<br />
Figure 202: Heating valve control with override<br />
Theheatingvalveworksthesameway,butthereisenoughspacein<br />
the heating valve module to add the override implementation on the<br />
same page (Figure 202).<br />
3. To accomplish the same alarm reset functionality, you must do a combination<br />
of configuration and programming in the <strong>Tracer</strong> MP580/581<br />
controller and at the <strong>Tracer</strong> Summit workstation. First, configure a<br />
binary variable to communicate the alarm reset value from the<br />
<strong>Tracer</strong> Summit system. One minor change is required to the alarms<br />
program. Add a binary variable to the manual reset alarm logic of the<br />
alarms program, as shown in Figure 203 on page 247.<br />
246 CNT-APG001-EN
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