### Logic pages The Logic page shows the control program for a piece of equipment. The live data (yellow text) is updated every few seconds and when you click the Logic button. The control program uses exact property values for its calculations, but values are rounded to 2 decimal places when displayed on the Logic page. TIP Click anywhere on the Logic page, then use your keyboard's Page Up, Page Down, and arrow keys to scroll through the page. NOTE If you find an unexpected value on a Properties page or a Logic page, you can use the Logic page to troubleshoot.
Click for details below To view a Logic page To locate a microblock, section, or label To change properties, alarms, or trends Using a Logic page to troubleshoot
#### To view a Logic page Select a piece of equipment on the Geographic or Network tree. Click Logic. Click a microblock to view its details.
#### To locate a microblock, section, or label Right-click the Logic page, then select Jump To. Do one of the following: On the Microblock or Section tab, select an item to have it located and highlighted. On the Label tab, select a label to display a reduced logic page outlined in yellow that shows all instances of the label. A red box indicates an output label; a yellow box indicates an input label. Click a red or yellow box to jump to that label in the full-size logic page. NOTE You can also click a label on the full-size Logic page to display the reduced Logic page.
#### To change properties, alarms, or trends Click a microblock on the equipment’s Logic page. In the microblock pop-up, click the Properties, Alarms, or Trends button. Change properties, alarms, or trends for that microblock in the same way that you would make changes on a regular Properties, Alarms, or Trends page. Click Accept. NOTE Right-click a value, then select Global Modify to view and change the property in other control programs.
#### Using a Logic page to troubleshoot The WebCTRL® application monitors your system and provides feedback. If you get unexpected feedback, you can use a Logic page as a troubleshooting tool. On the Logic page, work your way backward (right to left) through the sequence in the control program to discover what caused the problem. See Microblock Reference to understand what each microblock in the sequence is doing.
Unexpected feedback | Possible cause
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Space temperature reads excessively high or low | The sensor has a short (or open) circuit. Verify wires are properly connected at the sensor and controller. A sensor is missing or configured incorrectly. Open the sensor or input microblock from the Logic page to verify its configuration.
Equipment displays an unexpected color - effective setpoints are different than the programmed setpoints | NOTE Equipment operates using effective setpoints. Open the Setpoint microblock from the Logic page and check the following: Hysteresis Demand Level Optimal Start Timed Local Override (TLO) Setpoint Adjust
Gaps in trend data on trend graph | Usually gaps result if network communication was disrupted or a point was temporarily disabled. If the gap is not the result of interrupted communication, send reports more frequently. From the Logic page, open the trend microblock that displayed the gap in data, then decrease the notification threshold so that it is approximately 40% of the buffer size (allocated memory size) for that microblock.
The WebCTRL® application is not receiving alarms from a BACnet alarm microblock | Locate the microblock on the Logic page. If the color square on the microblock is black, the alarm is disabled. To enable it: Click the microblock. In the microblock pop-up, click the Alarms button. On the Enable/Disable tab, select Potential alarm source.
The equipment is on when I expect it to be off, or off when I expect it to be on | Use the Logic page to determine whether the program is sending an unexpected signal and why, or if the problem is with the physical equipment. For example, the On-Off-Auto (OOA) switch on the controller for that equipment may be locked in the On (Hand) position.
Sensor value on the Properties page does not match the reading from handheld sensor | Calibrate the sensor. On the Logic page, check to see if the output point is locked on.