Rockwell Automation 20G PowerFlex 750-Series AC Drives - Manual (Page 92)

92 Rockwell Automation Publication 750-RM002B-EN-P - September 2013
Chapter 1 Drive Configuration
For Invert function, refer to the [Anlg In
n LssActn] parameter.
Normal operation requires that P354 [Wake Level] be set greater than P352
[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 P352 [Sleep Level] is made
greater than P354 [Wake Level] while the drive is running, the drive continues to
run as long as the P351 [SleepWake RefSel] signal remains at a level that doesn’t
trigger the sleep condition. P353 [Sleep Time] is also factored into this as well.
Once the drive goes to sleep in this situation, it is not allowed to restart until the
level settings are corrected (increase P354 [Wake Level], or decrease P352 [Sleep
Level]). If however, the levels are corrected prior to the drive going to sleep,
normal Sleep/Wake operation continues.
Timers
P353 [Sleep Time]
P355 [Wake Time]
Timers determine the length of time required for Sleep/Wake levels to produce
true functions. These timers start counting when the Sleep/Wake levels are met
and count in the opposite direction whenever respective level is not met. 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 powerup,
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 that ignore the
Sleep/Wake function.
1. When a device is commanding local control, that is HIM in Manual mode
or a digital input programmed to P172 [DI Manual Ctrl].
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 if digital input is programmed to P172 [DI
Manual Ctrl], a digital input start or run is able to override a sleep situation.