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Programming Your Application
6-65
590+ Series DC Digital Converter
RAMPS
Functional Description
RAMP INPUT
MIN. SPEED
Jog /
I/P
O/P
1
0
RAMP DECEL TIME
RAMP ACCEL TIME
RAMP HOLD
AUTO RESET
EXTERNAL RESET
RESET VALUE
Slack
"S" RAMP
0
I/P
O/P
t
% S-RAMP
RAMPING THRESH.
RAMPING
RAMP OUTPUT
INVERT
+
-
Parameter
Tag
Range
EXTERNAL RESET
288
DISABLED / ENABLED
When ENABLED, the ramp is reset to RESET VALUE. EXTERNAL RESET does not
depend on AUTO RESET for its operation.
RESET VALUE
422
-300.00 to 300.00 %
The ramp output value at power-up, or when the ramp is reset. In order to catch a spinning
load smoothly (`bumpless transfer’) connect SPEED FEEDBACK Tag No. 62 (source) to
RESET VALUE Tag No. 422 (destination).
MIN. SPEED
126
0.00 to 100.00 %
(MIN SPEED)
The minimum speed clamp is fully bi-directional and operates with a 0.5% hysterisis. This
clamp operates on the input to the ramp and it can therefore be overridden by the RESET
VALUE as far as the ramp output is concerned.
Input
Output
Minimum Speed
-0.5
0
0.5