Rockwell Automation Allen-Bradley PowerFlex 520 Series, Руководство пользователя, Страница: 211 / 272

Rockwell Automation Publication 520-UM001K-EN-E - August 2021 211
Appendix
D
Velocity StepLogic, Basic Logic and Timer/
Counter Functions
Four PowerFlex 520-series logic functions provide the capability to program
simple logic functions without a separate controller.
• Velocity StepLogic Function (specific to PowerFlex 525 drives only)
Steps through up to eight preset speeds based on programmed logic.
Programmed logic can include conditions that need to be met from
digital inputs programmed as “Logic In 1” and “Logic In 2” before
stepping from one preset speed to the next. A timer is available for
each of the eight steps and is used to program a time delay before
stepping from one preset speed to the next. The status of a digital
output can also be controlled based on the step being executed.
• Basic Logic Function (specific to PowerFlex 525 drives only)
Up to two digital inputs can be programmed as “Logic In 1” and/or
“Logic In 2”. A digital output can be programmed to change state based
on the condition of one or both inputs based on basic logic functions
such as AND, OR, NOR. The basic logic functions can be used with or
without StepLogic.
• Timer Function
A digital input can be programmed for “Timer Start”. A digital output
can be programmed as a “Timer Out” with an output level
programmed to the desired time. When the timer reaches the time
programmed into the output level the output will change state. The
timer can be reset with a digital input programmed as “Reset Timer”.
• Counter Function
A digital input can be programmed for “Counter In”. A digital output
can be programmed as “Counter Out” with an output level
programmed to the desired number of counts. When the counter
reaches the count programmed into the output level the output will
change state. The counter can be reset with a digital input
programmed as “Reset Counter”.
Use the Wizard in Connected Components Workbench software to simplify
setup instead of manually configuring the parameters.