Digital Inputs - Allen-Bradley PowerFlex 70 Reference Manual

Digital Inputs

Digital Inputs
70
0 0 0 0 1 1 1 0 1 0 0
15 14 13 12 11 10 9 8 7 6 5
Bit #
0 0 0 1 Accel 1
0 0 1 0 Accel 2
0 1 0 0 Decel 1
1 0 0 0 Decel 2
The effectiveness of these bits or digital inputs can be affected by [Decel Mask].
See Masks on page 113 for more information.
Times are adjustable in 0.1 second increments from 0.0 seconds to 3600.0
seconds.
In its factory default condition, when no decel select inputs are closed and no
time bits are "1, " the default deceleration time is [Decel Time 1] and the rate is
determined as above.
Cable Selection
Refer to "Wiring and Grounding Guidelines for Pulse Width Modulated (PWM)
AC Drives, " publication DRIVES-IN001 for detailed information on Cable
Selection for Digital Inputs.
Wiring Examples
Refer to the appropriate PowerFlex user manual for wiring diagrams.
PowerFlex 70
Each digital input has a maximum response/pass through/function execution
time of 25ms. For example, no more than 25ms should elapse from the time the
level changes at the Start input to the time voltage is applied to the motor.
There is both hardware and software filtering on these inputs. The hardware
provides an average delay of 12ms from the time the level changes at the input to
the earliest time that the software can detect the change. The actual time can vary
between boards from 7 to 17ms, but any particular board should be consistent to
within 1% of its average value. The amount of software filtering is not alterable by
the user.
PowerFlex 700
Each digital input has a maximum response/pass through/function execution
time of 25ms. This means that, for example, no more than 25ms should elapse
from the time the level changes at the Start input to the time voltage is applied to
the motor.
Rockwell Automation Publication PFLEX-RM001H-EN-P - June 2013
1 = Condition True
0 1 1 0 0
0 = Condition False
4 3 2 1 0
x = Reserved