Allen-Bradley MicroLogix 1400 - Page 164

Publication 1766-RM001A-EN-P - October 2008
162 Using High-Speed Outputs
• Set (1) - Whenever the PWM instruction is within the run phase of
the output profile.
• Cleared (0) - Whenever the PWM instruction is not within the run
phase of the output profile.
PWMX Accelerating Status (AS)
The PWMX AS (Accelerating Status) bit is controlled by the PWM
sub-system. It can be used by an input instruction on any rung within the
control program. The AS bit operates as follows:
• Set (1) - Whenever a PWM output is within the acceleration phase of
the output profile.
• Cleared (0) - Whenever a PWM output is not within the acceleration
phase of the output profile.
PWMX Profile Parameter Select (PP)
The PWMX PP (Profile Parameter Select) selects which component of the
waveform is modified during a ramp phase:
• Set (1) - selects Frequency
• Cleared (0) - selects Duty Cycle
The PWMX PP bit cannot be modified while the PWM output is running/
enabled. See PWMX ADD on page 166 for more information.
Element Description Address Data Format Range Type User Program
Access
AS - Accelerating Status PWM:0/AS bit 0 or 1 status read only
Element Description Address Data Format Range Type User Program
Access
PP - Profile Parameter Select PWM:0/PP bit 0 or 1 control read/write
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