Allen-Bradley MicroLogix 1400 Instruction Manual page 166

efesotomasyon.com - Allen Bradley,Rockwell,plc,servo,drive
164 Using High-Speed Outputs
Element Description
OF - PWM Output Frequency
Publication 1766-RM001A-EN-P - October 2008
PWMX Enable Hard Stop (EH)
Element Description
EH - PWM Enable Hard Stop
The PWMX 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.
PWMX Enable Status (ES)
Element Description Address
ES - PWM Enable Status PWMX:0/ES bit
The PWMX 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.
PWMX Output Frequency (OF)
Address Data Format
PWMX:0.OF long word
(32-bit INT)
The PWMX OF (Output Frequency) variable defines the frequency of the
PWM function. This frequency can be changed at any time. In the
MicroLogix 1400 controller, the data less than zero or greater than 40,000
generates a PWM error.
Address Data Range Type
Format
PWMX:0/EH bit 0 or 1
Data Format Range Type
0 or 1
Range Type
0...40,000 control read/write
User Program
Access
control read/write
User Program
Access
status read only
User Program Access