Lenze i550

9.1 HTL encoder
In case of the inverter i550, the digital inputs DI3 and DI4 can be congured as HTL input to
evaluate the signal of a cost-eecve HTL encoder.
Precondions
•
Single-track or two-track HTL encoder.
•
A single-track HTL encoder (track A) cannot be used for motor speed feedback.
•
A two-track HTL encoder (track A and B) must have a phase oset of exactly 90°
between track A and B (error ≤ ± 10°). Inverted tracks are not required.
•
Encoder increments: ≤ 16384 increments per revoluon
•
For supplying the encoder, the maximum supply current of the inverter must be consid-
ered. If necessary, an external 24-V voltage supply for the encoder is required.
•
For using the digital inputs DI3 and DI4 as HTL input, the corresponding input funcon
must be set in 0x2630:002 (P410.02).
Restricons
•
When the digital inputs DI3 and DI4 are congured as HTL input, these two digital inputs
are no longer available for other control funcons.
•
The HTL input can be either used for detecng an HTL encoder signal or a pulse train. They
cannot be used at the same me.
•
The maximum input frequency of the digital inputs is 100 kHz. If this frequency is excee-
ded, an error is triggered.
Intended use
An HTL encoder can be used at the Inverter i550 for the following tasks:
•
As motor encoder for a motor speed feedback for speed control that is as precise as possi-
ble 4Servo control for asynchronous motor (SC-ASM) ^ 169.
•
As standard setpoint source (setpoint encoder):
Intended use Parameter Seng Further informaon
As a setpoint encoder for dening a
frequency setpoint.
0x2860:001
(P201.01)
HTL input [4]
Frequency control 4Standard setpoint source ^ 82
As setpoint encoder for dening
the reference value for the process
controller.
0x2860:002
(P201.02)
HTL input [4]
Frequency control 4Conguring the process controller ^ 116
As a setpoint encoder for dening a
torque setpoint.
0x2860:003
(P201.03)
HTL input [4]
Torque control4Standard setpoint source ^ 151
As an alternave to the seng as a standard setpoint source, the "Acvate setpoint via HTL input" 0x2631:022 (P400.22) funcon can be used to
enable a setpoint change-over to the HTL input.
•
As actual value source (actual value encoder):
Intended use Parameter Seng Further informaon
As actual value encoder for the
process controller.
0x4020:002
(P600.02)
HTL input [6]
Frequency control 4Conguring the process controller ^ 116
As actual value encoder for the
"posion counter" funcon.
0x2C49:001
(P711.01)
Feedback 1 (DI3/
DI4) [1]
Conguring the network4Posion counter ^ 538
•
Speed feedforward control source 0x4020:004 (P600.04).
Conguring the feedback system
HTL encoder
162