Htl Encoder - Lenze i55AE125B Manual

Additional functions
Encoder settings

HTL encoder

11.18.1 HTL encoder
In case of the inverter i550, the digital inputs DI3 and DI4 can be configured as HTL input to
evaluate the signal of a cost-effective HTL encoder or a reference frequency ("pulse train").
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 as precise as possible.
•
As setpoint encoder for defining a frequency setpoint.
•
As setpoint encoder for defining the reference value for the process controller.
•
As setpoint encoder for defining a torque setpoint.
•
As actual value encoder for the process controller.
•
As actual value encoder for the "position counter" function.
•
Preconditions
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 offset of exactly 90°
•
between track A and B (error ≤ ±10°). Inverted tracks are not required.
Encoder increments: ≤ 16384 increments per revolution
•
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.
Restrictions
When the digital inputs DI3 and DI4 are configured as HTL input, these two digital inputs
•
are no longer available for other control functions.
The HTL input can be either used for detecting an HTL encoder signal or a pulse train. They
•
cannot be used at the same time.
The maximum input frequency of the digital inputs is 100 kHz. If this frequency is excee-
•
ded, an error is triggered.
Connection
Connection of single-track HTL encoder
(without external 24-V voltage supply)
Connection of single-track HTL encoder
(with external 24-V voltage supply)
DC 24 V SELV/PELV
(+19.2 ... +28.8 V)
496
A
A
DC 24 V SELV/PELV
(+19.2 ... +28.8 V)
Connection of two-track HTL encoder
(without external 24-V voltage supply)
A
Connection of two-track HTL encoder
(with external 24-V voltage supply)
A
B
B