NORD Drivesystems BU0700 User Manual
Page 83
BU 0700 GB-1411
Subject to technical alterations
83
Value Function
Description
Signal
26
Torque current limit
2 3 5
Adjustable load limit, the output frequency is reduced when it is
reached.
P112
analog
27
Actual PID frequency
2 3 4 5
Possible actual value feedback for PID controller
analog
28
Frequency addition
2 3 4 5
Addition to other frequency setpoint values
analog
29
Frequency subtraction
2 3 4 5
Subtraction from other frequency setpoint values
analog
Digital inputs can be used for simple analog signals (max. 7 Bit resolution).
30
PID Control on/off
5
Switching the PID controller function on and off (High = ON)
High
31
Enable right blocked
5
Blocks the >Enable right/left< via a digital input or Bus control.
Does not depend on the actual direction of rotation of the motor
(e.g. following negated setpoint).
Low
32
Enable left blocked
5
low
33
Current limit
2 3 5
Based on the set current limit (P536), this can be changed using
the digital/analog input.
analog
34
Maximum frequency
2 3 4 5
The maximum frequency of the FI is set in the analog range.
100% corresponds to the setting in parameter P411. 0%
corresponds to the setting in parameter P410. The values for the
min/max output frequency (P104/P105) cannot be exceeded or
undershot.
analog
35
Actual frequency PID controller
limited
2 3 4 5
Needed to build up a control loop. The digital/analog input (actual
value) is compared with the setpoint (e.g. other analog input or
fixed frequency). The output frequency is adjusted as far as
possible until the actual value equals the setpoint. (see control
variables P413
– P416)
The output frequency cannot fall below the programmed minimum
frequency value in parameter P104. (No rotation direction
change!)
analog
36
Actual frequency PID controller
monitored
2 3 4 5
Like function 35, but the FI switches the output frequency off
when the >Minimum frequency< P104 is reached.
analog
37
Torque Servo mode
2 3 5
The motor torque can be set or limited via this function in Servo
mode.
analog
38
Precontrol torque
2 3 5
Function that enables a value for the anticipated torque
requirement to be entered in the controller (interference factor
switching) This function can be used to improve the load take-up
of lift equipment with separate load detection.
P214
analog
39
Multiplication
3 5
This factor multiplies the master setpoint value.
analog
40
Current value process controller
3 5
like P400 = 14-16
Further details regarding the process controller can be found in
Chapter 8.2
analog
41
Setpoint value process controller
3 5
analog
42
Precontrol process controller
3 5
analog
Digital inputs can be used for simple analog signals (max. 7 Bit).
47
Motor potentiometer frequency +
5
If the FI is enabled (R or L), the output frequency can be infinitely
varied with a high signal. To save an actual output frequency in
P113, both inputs must be set to a high potential simultaneously
for 1s. This value then applies as the next starting value during
Enable when the same direction sign has been selected.
Otherwise start with be with f
MIN
(P104).
High
48
Motor potentiometer frequency -
5
High
1
If neither of the digital inputs are programmed for left or right enable, then the actuation of a fixed frequency or jog
frequency will enable the inverter. The rotation field direction depends on the sign of the setpoint.
2
Also effective for Bus control (RS485, CANnord, CANopen, DeviceNet, Profibus DP, InterBus, RS232)
3
Functions only available for Basic and Standard I/O, analog setpoints are processed. They are suitable for simple
requirements (7 bit resolution).
4
The limits of these values are set by the parameters >Minimum frequency auxiliary setpoints< P410 and >Maximum
frequency auxiliary setpoints< P411.
5
Settings are not available with P424 and P425 (Multi I/O).