Rockwell Automation Publication 1756-AT017A-EN-P - January 2013
Position-based Output Control with the MAOC Instruction 3
Product Diverting
In a product diverting application, product moves from one high-speed conveyor
to another via pneumatic or electrical drivers.
In this application, use the instruction to trigger the output when the product is
directly in front of the diverter.
This application is particularly useful for any kind of product quality rejection
system and also works well for material handling.
Operation
By itself, the MAOC instruction enables position-based output control in these
ways:
• Uses the position of any motion axis in a ControlLogix® system as the
position reference
• Uses any output or DINT
• Updates outputs based on the motion axis position at the motion group
coarse update rate, typically 1…32 ms
The instruction can update standard digital output modules at the coarse update
rate. However, some high speed applications require a higher degree of accuracy.
The 1756-OB16IS, 1756-OB16IEFS, and 1732E-OB8M8SR scheduled output
modules improve the accuracy of the MAOC instruction by supporting the
ability to schedule output On and Off times. All of the scheduling configuration
for an output’s On and Off times is completed through the MAOC instruction.
The instruction then updates values in the module’s output tags that define the
scheduled output behavior.
Table 1 - Scheduled Output Module Features
Feature 1756-OB16IS 1756-OB16IEFS 1732E-OB8M8SR
Number of schedules 16 32 16
Output points available
for scheduling
8 (points 0…7) 16 (points 0…15) 8 (points 0…7)
Remote operation None Remote chassis On-Machine™ over the
EtherNet/IP network
Minimum schedule interval
(1)
(1) The MAOC limits the minimum schedule interval (minimum pulse width) to 1/16 of the coarse update period.
100 μs 5 μs 100 μs
To Next Page
Loading...
Need help?
General
