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Programming Your Application
6-73
590+ Series DC Digital Converter
SPEED LOOP
Parameter
Tag
Range
INT. TIME CONST.
13
0.001 to 30.000 SECS
(SPD.INT.TIME)
Speed loop PI integral gain adjustment.
INT. DEFEAT
202
OFF / ON
When ON it inhibits the integral part of the speed loop PI control to give proportional only
control.
SPEED FBK FILTER
547
0.000 to 1.000
(SPD.FBK.FILTER)
A simple filter function that is applied to speed feedback to reduce ripple caused by low
line count encoders and noisy tachos. A value of 0 disables the filter action ,and 1.00 is the
maximum value. A typical value would be between 0.5 and 0.75.
INCREASING THE FILTER VALUE MAY MAKE THE SPEED LOOP UNSTABLE.
The filter time constant
W
in milliseconds can be calculated from the following equation:
¸
¹
·
¨
©
§
D
W
1
3
.
3.
e
Log
Where
D
is the value of SPD FBK FILTER. A value of 0.5 equates to a filter time of 4.8ms,
0.8 to 14.7ms, and 0.9 to 31.2ms.
ENCODER FILTER
554
See below
Reserved parameter for use by SSD Drives.
SETPOINT 1
289
-105.00 to 105.00 %
Speed Setpoint 1 (Default Setpoint Sum 1 O/P).
SIGN 2 (A3)
9
NEGATIVE / POSITIVE
Speed Setpoint 2 Sign.
RATIO 2 (A3)
7
-3.0000 to 3.0000
Speed Setpoint 2 Ratio.
SETPOINT 2 (A3)
290
xxx.xx %
Speed Setpoint 2 - Fixed (non-configurable) setpoint scanned synchronously with the
current loop
SETPOINT 3
291
-105.00 to 105.00 %
Speed Setpoint 3 (Default Ramp O/P).
SETPOINT 4
41
-105.00 to 105.00 %
Speed Setpoint 4 (Default 5703 I/P).
MAX DEMAND
357
0.00 to 105.00 %
Sets the maximum input to the speed loop. It is clamped at 105% to allow for overshoot in
the external loops.
MIN DEMAND
358
-105.00 to 105.00 %
Sets the minimum input to the speed loop.