Parker 590 series, Product Manual

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6-44
Programming Your Application
590 Series DC Digital Converter
RAMPS
This function block forms part of the
reference generation. It provides the facility
to control the rate at which the Converter
will respond to a changing setpoint.
MMI Menu Map
1 SETUP PARAMETERS
2 RAMPS
RAMP ACCEL TIME
RAMP DECEL TIME
RAMP HOLD
RAMP INPUT
% S-RAMP
RAMPING THRESH.
AUTO RESET
EXTERNAL RESET
RESET VALUE
MIN SPEED
RAMPS
RAMP OUTPUT [ 85] – 0.00%
RAMPING [113] – FALSE
10.0 SECS – [ 2] RAMP ACCEL TIME –
10.0 SECS
–
[ 3] RAMP DECEL TIME
–
OFF – [118] RAMP HOLD –
0.00 % – [ 5] RAMP INPUT –
2.50 %
–
[266] % S-RAMP
–
0.50 % – [286] RAMPING THRESH. –
ENABLED – [287] AUTO RESET –
DISABLED – [288] EXTERNAL RESET –
0.00 %
–
[422] RESET VALUE
–
0.00 % – [126] MIN. SPEED –
Parameter Descriptions
RAMP ACCEL TIME Range: 0.1 to 600.0 SECS
Acceleration time (100% change)
RAMP DECEL TIME Range: 0.1 to 600.0 SECS
Deceleration time (100% change)
RAMP HOLD Range: ON/OFF
While ON, the ramp output is held at its last value. This is overridden by Ramp Reset .
RAMP INPUT Range: -100.00 to 100.00 %
Ramp Input TAG.
% S-RAMP Range: 0.00 to 100.00 %
Percentage of ramp with S-shaped rate of change. A value of zero is equivalent to a linear
ramp. Changing this value affects the ramp times.
RAMPING THRESH. Range: 0.00 to 100.00 %
Ramping flag threshold level. The threshold is used to detect whether the ramp is active.
AUTO RESET Range: ENABLED/DISABLED
If TRUE, then the ramp is reset whenever SYSTEM RESET is TRUE, that is each time the
Speed/Current loop is unquenched. (SYSTEM RESET Tag No. 374 is an internal flag that is
set TRUE for one cycle after the Speed/Current loop is enabled, i.e. every time the drive is
started).
EXTERNAL RESET Range: ENABLED/DISABLED
If TRUE, then the ramp is held in reset. EXTERNAL RESET does not depend on AUTO
RESET for its operation.
RESET VALUE Range: -300.00 to 300.00 %
This value is pre-loaded into the output when RAMP RESET is TRUE, or at power-up. In
order to catch a spinning load smoothly (`bumpless transfer’) connect SPEED FEEDBACK
Tag No. 62 (source) to RESET VALUE Tag No. 422 (destination).