Parker 590 series, Product Manual

Page: 146 / 242

6-56
Programming Your Application
590 Series DC Digital Converter
STANDSTILL
Standstill logic is used to inhibit rotation
when operating with Zero Speed demand.
If the drive is below the Zero Speed
threshold and Standstill logic is enabled,
then the speed and current loops are
quenched. This prevents shaft oscillation
around zero speed.
It is useful in preventing gearbox wear due
to “chattering”.
Functional
Description
Standstill Logic inhibits the
controller at zero setpoint and
zero speed, i.e. at standstill.
The main contactor remains in
and the Run LED remains ON.
11 STANDSTILL LOGIC DISABLED
12 ZERO THREHOLD 2.00%
SPEED
FEEDBACK
FROM
SPEED LOOP
SPEED
SETPOINT
FROM
SETPOINT
STANDSTILL
TAG# PARAMETER
DEFAULT
SETTING
78
77
79
AT ZERO SPEED
D:14
D:12
AT ZERO SETPOINT D:13
AT STANDSTILL
TO
DRIVE ENABLE
DIGITAL O/P1
B5
( DEFAULT
CONFIGURATION )
MMI Menu Map
1 SETUP PARAMETERS
2 STANDSTILL
STANDSTILL LOGIC
ZERO THRESHOLD
STANDSTILL
– AT ZERO SETPOINT [ 78] – TRUE
– AT ZERO SPEED [ 77] – TRUE
–
AT STANDSTILL [ 79]
–
TRUE
89 – [306] ZERO SETPOINT –
DISABLED – [ 11] STANDSTILL LOGIC –
2.00%
–
[ 12] ZERO THRESHOLD
–
Parameter Descriptions
ZERO SETPOINT
(SOURCE TAG) Reserved parameter for use by Parker SSD Drives.
STANDSTILL LOGIC Range: ENABLED/DISABLED
If TRUE, the Converter is quenched (although the contactor remains in) when the Speed
Feedback and Speed Setpoint values are less than ZERO THRESHOLD.
ZERO THRESHOLD Range: 0.00 to 100.00 %
Threshold level which defines zero setpoint and zero speed diagnostic outputs and also controls
the zero speed relay output.
AT ZERO SETPOINT
Refer to the DIAGNOSTICS function block description, page 6-18.
AT ZERO SPEED
Refer to the DIAGNOSTICS function block description, page 6-18.
AT STANDSTILL
Refer to the DIAGNOSTICS function block description, page 6-18.
0%
STANDSTILL LOGIC ENABLED
0%
SPEED SETPOINT
SPEED FEEDBACK
ZERO THRESHOLD
(DEFAULT 2.00%)
CURVE DEPENDS ON LOAD
CHARACERISTICS
0%
DRIVE ENABLE OUTPUT
t
t
t