Allen-Bradley MicroLogix 1200 Reference Manual page 121

PWM Normal Operation (NS)
Element Description
NS - PWM Normal Operation
The PWM NS (Normal Operation) bit is controlled by the PWM
sub-system. It can be used by an input instruction on any rung within the
control program to detect when the PWM is in its normal state. A normal
state is defined as ACCEL, RUN, or DECEL with no PWM errors.
• Set (1) - Whenever a PWM instruction is in its normal state.
• Cleared (0) - Whenever a PWM instruction is not in its normal state.
PWM Enable Hard Stop (EH)
Element Description
EH - PWM Enable Hard Stop
The PWM EH (Enable Hard Stop) bit stops the PWM sub-system
immediately. A PWM hard stop generates a PWM sub-system error.
• Set (1) - Instructs the PWM sub-system to stop its output modulation
immediately (output off = 0).
• Cleared (0) - Normal operation.
PWM Enable Status (ES)
Element Description Address
ES - PWM Enable Status PWM:0/ES bit
The PWM ES (Enable Status) is controlled by the PWM sub-system. When
the rung preceding the PWM instruction is solved true, the PWM
instruction is enabled, and the enable status bit is set. When the rung
preceding the PWM instruction transitions to a false state, the enable
status bit is reset (0) immediately.
• Set (1) - PWM is enabled.
• Cleared (0) - PWM has completed or the rung preceding the PWM is
false.
Address Data Range
Format
PWM:0/NS bit 0 or 1
Address Data Range Type
Format
PWM:0/EH bit 0 or 1
Data Format Range Type
0 or 1
Using High-Speed Outputs 6-23
Type User Program
Access
status read only
User Program
Access
control read/write
User Program
Access
status read only
Publication 1762-RM001C-EN-P