Carotron Elite Pro EPN020-000, Instruction Manual

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Drive Mode (109, 110)
The two mode select parameters determine the operating mode of the drive. Parameter 109
in the Most Significant Bit (MSB) and parameter 110 is the Least Significant Bit (LSB). The
Toggle softkey on the keypad scrolls through each of the selections.
MSB LSB Mode
0 0 Velocity
0 1 Torque
1 0 Undefined (1)
1 1 Undefined (2)
Table 9: Drive Modes
Torque Reference (97)
When in Torque mode, the
Current Demand is equal to the Torque Reference . The
Velocity Loop Output is ignored. The Ramp Output writes to this parameter in the factory
preset configuration.
Current Demand (111, Read-Only)
When in Velocity mode, the
Current Demand is equal to the Velocity Loop Output . Torque
Reference is ignored.
Auxiliary Current Demand (98)
The
Auxiliary Current Demand serves as a bias that is summed with the Current Demand
signal.
Independent Current Limits (493)
When this parameter is True, the current limit levels are set by the two separate adjustments,
Positive Current Limit and Negative Current Limit . When False, both the positive and
negative current limit levels are adjusted by the Positive Current Limit .
Positive Current Limit (99)
This adjustment sets the maximum level of positive current that can be demanded by the
current loop. Positive current is used when the drive is motoring in the forward direction or
regenerating in the reverse direction. When
Independent Current Limits is False, this
parameter also sets negative current limit level.
Negative Current Limit (100)
When
Independent Current Limits is False, this adjustment sets the maximum level of
negative current that can be demanded by the current loop. Negative current is used when
the drive is motoring in the reverse direction or regenerating in the forward direction.
Slew Rate Limit (500)
This parameter limits the rate of change of the Current Demand. The setting is as follows:
100
p[500] 6 p[123]
(Amps/sec) Rate Slew
× ×
=
f
where p[123] is parameter 123 Nameplate Motor Current, f is line frequency (typically 50 or
60 Hz), and p[500] is parameter 500 Slew Rate Limit. Note: setting this adjustment to zero
disables the slew rate limit function.
Final Current Demand (101, filtered-113, Read-Only)
The
Current Demand and Auxiliary Current Demand signals sum together and are limited
by the Positive Current Limit and Negative Current Limit parameters to form the Final
Current Demand . This signal can also be limited by the Foldback logic to 107%. A filtered