t Owner manual

394 Rockwell Automation Publication IASIMP-QS016C-EN-P - October 2014
Chapter 13 Time of Day Control
Follow These Steps
The following steps are based on a CompactLogix 1769-L23E-QBFC1 packaged controller, but the general steps may be
applied to other Logix controller configurations and are similar. Follow these steps to implement your Time of Day Control
application:
• Control Hardware Selection and Wiring
• Logic Integration
• HMI Integration
• System Commissioning
Control Hardware Selection and Wiring
You need to determine what your system will contain.
List Load Outputs and Inputs
1. Determine which loads in your application will be controlled by the Time of Day controller (maximum of 16 loads).
2. Number each load from 1…16.
3. List the outputs and inputs associated with each load.
As a minimum each load must accept a command to run from the Time of Day Controller. The Time of Day
Controller will also accept a load status input that can be used for indication and alarming, however this is not
required.
In the Efficient Industries Plant 1 example, the monitoring and analysis revealed some significant energy savings if
TOD control was used to control the loads identified below:
Load Number Loads Output Description Output I/O Location Input Description Input I/O Location
1 Boiler 1 Command On Local:2:O.Data.0 Status Feedback Local:1:I.Data.0
2 Boiler 2 Command On Local:2:O.Data.1 Status Feedback Local:1:I.Data.1
3 Air Compressor 1 Command On Local:2:O.Data.2 Status Feedback Local:1:I.Data.2
4 Air Compressor 2 Command On Local:2:O.Data.3 Status Feedback Local:1:I.Data.3
5 Air Compressor 3 Command On Local:2:O.Data.4 Status Feedback Local:1:I.Data.4
6 Lighting Production
Area 1
Command On Local:2:O.Data.5 Status Feedback Local:1:I.Data.5
7 Lighting Production
Area 2
Command On Local:2:O.Data.6 Status Feedback Local:1:I.Data.6
8 Lighting Shipping/
Receiving
Command On Local:2:O.Data.7 Status Feedback Local:1:I.Data.7
9 Lighting Office Command On Local:2:O.Data.8 N/A N/A