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Pulse Train Output Error Codes
Error
Non-User
Recoverable
Code
Fault
Fault
5
No
No
6
No
Yes
7
No
Yes
PWM - Pulse Width
Modulation
PWM
PWM
Pulse Width Modulation
PWM Number
1
Instruction
Error
Description
Errors
Name
Yes
Jog Error PTO is in the idle state and two or more of the following are set:
• Enable (EN) bit set
• Jog Pulse (JP) bit set
• Jog Continuous (JC) bit set
This error does not fault the controller. It is automatically cleared when the
error condition is removed.
No
Jog
The jog frequency (JF) value is less than 0 or greater than 20,000. This error
Frequency
faults the controller. It can be cleared by logic within the User Fault Routine.
Error
No
Length
The total output pulses to be generated (TOP) is less than zero. This error
Error
faults the controller. It can be cleared by logic within the User Fault Routine.
The PWM function can only be used with the controller's
IMPORTANT
embedded I/O. It cannot be used with expansion I/O
modules.
The PWM instruction should only be used with
IMPORTANT
MicroLogix 1100 BBB unit. Relay outputs are not capable
of performing very high-speed operations.
MicroLogix 1100 Series A controller does not support
ATTENTION
40kHz PTO and PWM. Only MicroLogix 1100 Series B
controller supports 40kHz PTO and PWM with any
version of RSLogix500. Refer to Appendix F How to Use
40kHz PTO/PWM of MicroLogix 1100 Series B Controller
for more information.
Instruction Type: output
Execution Time for the PWM Instruction
Controller
MicroLogix 1100
When Rung Is:
True
False
51.9 μs
33.68 μs
Publication 1763-RM001C-EN-P - October 2009
Using High-Speed Outputs
149
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