The analogue input of the FI can be used for a variety of functions. Please keep in mind however
that only one of the functions listed below can be set and implemented at a time.
If for instance the PID actual frequency is selected, the frequency setpoint cannot possibly be an
anlogue signal. In that case one of the ways of transmitting the setpoint would be to apply a fixed
frequency.
0 = OFF, no function is assigned to the analogue input at all. On being enabled via the
control terminals the FI will supply the default or set minimum frequency according
to P104.
1 = Nominal frequency, according to the analogue range specified (P402/P403), the
output frequency is varied between minimum and maximum frequency set
(P104/P105).
2 = Torque current limit, the torque current limit as set in P112 can be varied by pro-
viding an analogue value. The torque current limit set in P112 is assumed to be
100% of the setpoint value. 20% of the setpoint value is the lowest value allowed
(10% provided that P300=1)!
3 = PID current freq.*, is required for control loop configuration. The analogue input
(actual value) is compared with the setpoint (which could be a fixed frequency).
The output frequency is continuously adjusted until the actual value has become
equal to the setpoint value (cf. controlled variables P413 to P415)
4 = Frequency addition *, the frequency value supplied is added to the setpoint.
5 = Frequency subtract. *, the frequency value supplied is subtracted from the set-
point.
6 = Current limit, the current limit set in parameter P536 can be varied via the ana-
logue input.
7 = Maximum frequency, the maximum frequency of the inverter is set within an ana-
logue range. A 100% value is equivalent to the setting made in parameter P411,
while 0% is equivalent to the setting of parameter P410. The control system en-
sures that the min./max. output frequency values (P104/P105) are not exceeded in
either direction.
8 = PID ltd. current.freq *, basically the same as function 3, PID actual frequency,
however with the output frequency being prevented from dropping below the
minimum frequency value programmed in parameter P104 (no reversal of the
phase sequence).
9 = PID suprvsd.cur.freq *, basically the same as function 3, PID actual frequency,
however with the output frequency being switched off when the minimum fre-
quency according to P104 has been reached.
10 = Servo-Mode Torque, when the FI is in servo mode, this function allows for setting
the motor torque.
11 = Pre-tension Torque, a function which enables the user to impress a value for the
anticipated torque requirement on the controller in advance (feed forward control).
This function is recommended for use on hoisting gear with separate load recogni-
tion to ensure that the load is taken over more rapidly and effectively.
12 = Not assigned for the time being
13 = Multiplication, the setpoint will be multiplied with the analogue value specified. In
this operation the analogue value aligned to 100% is equivalent to a multiplication
factor of 1.
… continued on the following page
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