Rockwell Automation 1732E-OB8M8SR EtherNet/IP Dual Port 8-Point SOE Input and Scheduled Output Modules UM - Manual (Page 93)

Rockwell Automation Publication 1732E-UM003B-EN-E - March 2014 83
Use the Sequence of Events Input and Scheduled Output Modules Chapter 10
The following is a simplified overview of how Time Slot data is utilized.
Overview of How Time Slot Data Utilization
Time slots are also used to process overlapping cam elements. A semaphore is
maintained to indicate the currently active state of each output bit. In addition, if
a programmed cam element Latch and Unlatch event occurs in the same time
slot, they cancel each other out.
I/O Subsystem
The user can specify the Output parameter of an MAOC instruction as either a
memory tag or an Output Module’s data tag. A pointer to the tag is passed into
the MAOC instruction. Also passed into the MAOC instruction is an internal
parameter of type IO_MAP. If the Output parameter references controller
memory, the IO_MAP parameter is NULL. If the Output parameter references
an output module, the IO_MAP parameter points to the map structure for the
module. The MAOC instruction can then determine if the Output parameter is
Output Off Mask For normal outputs, the bit corresponding to the output bit of the
Unlatch or Pulse Off event is set indicating that the output is to be
turned off for these events.
For inverted outputs, the bit corresponding to the output bit of the
Latch or Pulse On event is set indicating that the output is to be
turned off for these events.
Time Slot Information
Topic Description
Latch/unlatch detection
Interval Latch Event Mask Unlatch Event Mask
Pulsed Output Processing
Normal/Inverted Output Processing
Output On Mask Output Off Mask
Write Outputs