66 Rockwell Automation Publication 5094-UM001E-EN-P - April 2020
Chapter 4 Output Module Features
Features Specific to Only
Standard Output Modules
The following features are specific to only the 5094-OB16 and 5094-OB16XT
modules.
Time-scheduled Output Control
You can schedule times for module outputs to turn On or Off. The time
schedules use units in nanoseconds.
The timing of scheduled outputs for the 5094-OB16 and 5094-OB16XT
modules are as follows:
– ±100 μs accuracy
– 1 ns resolution
The module must be time synced or schedules are note applied.
Time-scheduled output control is used with the Motion Arm Output Cam
(MAOC) instruction. The MAOC instruction enables position-based output
control in these ways:
• Uses the position of any motion axis in a Logix 5000™ control system as the
position reference
• Updates the 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 scheduled output modules improve the accuracy of the MAOC instruction
by supporting the ability to schedule output On and Off times. All scheduling
configuration for the On and Off times of an output is completed through the
MAOC instruction. The instruction then updates values in the output s of the
module that define the scheduled output behavior.
STATUS
POWER
DIGITAL 16 INPUT 24 VDC
5094-IB16
1
1
TB3
FLEX 5000
TM
I/O
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
IMPORTANT These FLEX 5000 standard output modules are the only ones to support the
Time-scheduled Output Control feature:
• 5094-OB16
• 5094-OB16XT
Table 14 - FLEX 5000 Output Module Schedule Parameters
Feature 5094-OB16, 5094-OB16XT
Number of schedules 32
Output points available for scheduling 16 (points 0…15)
Remote operation N/A
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
For schedules output the MAOC instruction, you can use
50 μs.
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