Allen-Bradley MicroLogix 1200 Reference Manual page 123

Error Non-User Recoverable
Code Fault Fault
-2 Yes No
-1 Yes No
0
1 No No
2 No No
3 Yes Yes
4 Reserved
5 Yes Yes
PWM Accel/Decel Delay (ADD)
Element Description
ADD - Accel/Decel Delay PWM:0.ADD word (INT)
PWM ADD (Accel/Decel Delay) defines the amount of time in 10
millisecond intervals to ramp from zero to the specified frequency or
duration. Also specifies the time to ramp down to zero.
The PWM ADD value is loaded and activated immediately (whenever the
PWM instruction is scanned on a true rung of logic). This allows multiple
steps or stages of acceleration or deceleration to occur.
PWM Error Code (ER)
Element Description
ER - PWM Error Codes
PWM ER (Error Codes) detected by the PWM sub-system are displayed in
this register. The table identifies known errors.
Instruction Error Description
Errors Name
No Overlap An output overlap is detected. Multiple functions are assigned to the same
Error physical output. This is a configuration error. The controller faults and the
User Fault Routine does not execute. Example: PWM0 and PWM1 are both
attempting to use a single output.
No Output An invalid output has been specified. Output 2 and output 3 are the only valid
Error choices. This is a configuration error. The controller faults and the User Fault
Routine does not execute.
Normal Normal (0 = no error present)
Yes Hardstop This error is generated whenever a hardstop is detected. This error does not
Error fault the controller. It is automatically cleared when the hardstop condition is
removed.
Yes Output The configured PWM output (2 or 3) is currently forced. The forced condition
Forced must be removed for the PWM to operate. This error does not fault the
Error controller. It is automatically cleared when the force condition is removed.
No Frequency The frequency value is less than 0 or greater than 20,000. This error faults
Error the controller. It can be cleared by logic within the User Fault Routine.
No Duty Cycle The PWM duty cycle is either less than zero or greater than 1000.
Error
This error faults the controller. It can be cleared by logic within the User Fault
Routine.
Address Data Format Range
Address Data Format
PWM:0.ER word (INT)
Using High-Speed Outputs
Type User Program
Access
0 to 32,767 control read/write
Range Type User Program
Access
-2 to 5 status read only
Publication 1762-RM001C-EN-P
6-25