Programming Your Application
6-83
590+ Series DC Digital Converter
STOP RATES
These parameters are used by a regenerative
drive when stopping with Normal Stop or
Program Stop.
The stopping methods of the converter are
described in more detail in Chapter 4:
“Operating the Converter” - Starting and
Stopping Methods.
The inputs to this block are SPEED
SETPOINT and SPEED FEEDBACK from the
SPEED LOOP function block, the Run signal
from terminal C3, and PROGRAM STOP from terminal B8.
The outputs are SPEED DEMAND to the speed loop, PROG STOP I LIM to the current loop,
and signals to the coast stop and drive enable logic.
Normal Stop
A Normal Stop occurs when the Run signal is removed from terminal C3. It ramps the speed
demand to zero at a rate set by STOP TIME.
x
Non-regenerative drives can stop no faster than the coast stop rate.
x
Regenerative drives use STOP TIME to set the duration of the stop.
After the stop, the contactor de-energises and the drive disables.
The STOP LIMIT timer starts when C3 goes to 0V (the Run signal is removed). If the drive
speed has not reached STOP ZERO SPEED within the STOP LIMIT time, the contactor de-
energises and the drive disables.
During Normal Stops after the motor reaches zero speed, CONTACTOR DELAY delays the
de-energising of the contactor. When STOP ZERO SPEED is set above 0.25%, the drive
disables during the contactor delay. Below 0.25%, the drive disables after the contactor delay.
This is useful when using the Jog function to prevent multiple operations of the contactor.
CONTACTOR DELAY is overridden when terminal C5 (Enable Input) is at 0V.
Program Stop
PROGRAM STOP provides a controlled fast stop for regenerative drives. The stop time is set
by PROG STOP TIME. This timer starts once terminal B8 (Program Stop) goes to 0V. When
the drive reaches STOP ZERO SPEED, the contactor de-energises and the drive disables.
PROG STOP LIMIT sets the maximum time the Program Stop can take before the contactor
de-energises and the drive disables.
PROG STOP I LIM sets the current limit in the current loop during a Program Stop. Other
current limits can override it.
Stop Rates
SPEED DEMAND
[ 89]
–
0.00 %
PROGRAM STOP
[ 80]
–
FALSE
10.0 s
–
[ 27] STOP TIME
60.0 s
–
[217] STOP LIMIT
1.0 s
–
[302] CONTACTOR DELAY
0.0
–
[594] CURR DECAY RATE
0.1 s
–
[ 26] PROG STOP TIME
60.0 s
–
[216] PROG STOP LIMIT
100.00 %
–
[ 91] PROG STOP I LIM
2.00 %
–
[ 29] STOP ZERO SPEED
MMI Menu Map
1
SETUP PARAMETERS
2
STOP RATES
STOP TIME
STOP LIMIT
CONTACTOR DELAY
CURR DECAY RATE
PROG STOP TIME
PROG STOP LIMIT
PROG STOP I LIM
STOP ZERO SPEED
Parameter
Tag
Range
SPEED DEMAND
89
xxx.xx %
Refer to the DIAGNOSTICS function block description, page 6-23.
PROGRAM STOP
80
FALSE / TRUE
Refer to the DIAGNOSTICS function block description, page 6-23.
STOP TIME
27
0.1 to 600.0 s
Time to reach zero speed from 100% set speed in normal stop mode (terminal C3 = 0V).
STOP LIMIT
217
0.0 to 600.0 s
The maximum time a controlled stop can take in a Normal Stop (regenerative breaking)
before the drive will coast to stop. The timer is triggered when terminal C3 = 0V.