Allen-Bradley PowerFlex 70 Reference Manual page 161

Sleep Mode
Timers
Timers will determine the length of time required for Sleep/Wake levels to
produce true functions. These timers will start counting when the Sleep/Wake
levels are satisfied and will count in the opposite direction whenever the
respective level is dissatisfied. If the timer counts all the way to the user specified
time, it creates an edge to toggle the Sleep/Wake function to the respective
condition (sleep or wake). On power up, timers are initialized to the state that
does not permit a start condition. When the analog signal satisfies the level
requirement, the timers start counting.
Interactive functions
Separate start commands are also honored (including a digital input "start"), but
only when the sleep timer is not satisfied. Once the sleep timer times out, the
sleep function acts as a continuous stop. There are two exceptions to this, which
will ignore the Sleep/Wake function:
1. When a device is commanding "local" control
2. When a jog command is being issued.
When a device is commanding "local" control, the port that is commanding it has
exclusive start control (in addition to ref select), essentially overriding the Sleep/
Wake function, and allowing the drive to run in the presence of a sleep situation.
This holds true even for the case of Port 0, where a digital input start or run will
be able to override a sleep situation.
Sleep/Wake Levels
Normal operation will require that [Wake Level] be set greater than or equal to
[Sleep Level]. However, there are no limits that prevent the parameter settings
from crossing, but the drive will not start until such settings are corrected. These
levels are programmable while the drive is running. If [Sleep Level] is made
greater than [Wake Level] while the drive is running, the drive will continue to
run as long as the analog input remains at a level that doesn't trigger the sleep
condition. Once the drive goes to sleep in this situation, it will not be allowed to
restart until the level settings are corrected (increase wake, or decrease sleep). If
however, the levels are corrected prior to the drive going to sleep, normal Sleep/
Wake operation will continue.
Sleep/Wake Sources
All defined analog inputs for a product shall be considered as valid Sleep/Wake
sources. The Sleep/Wake function is completely independent of any other
functions that are also using the assigned analog input. Thus, using the same
analog input for both speed reference and wake control is permitted. Also,
[Analog In x Hi] and [Analog In x Lo] parameters have no affect on the function.
However, the factory calibrated result will be used. In addition, the absolute value
of the calibrated result will be used, thus making the function useful for bipolar
direction applications. The analog in loss function is unaffected and therefore
operational with the Sleep/Wake function, but not tied to the sleep or wake
levels.
Rockwell Automation Publication PFLEX-RM001H-EN-P - June 2013 161