Question:
What is the maximum permissible frequency at the frequency inputs DI1/DI2 and DI6/DI7?
Which maximum number of encoder increments can be derived from this value for a motor operated with up to max. 3000 rpm?
Answer:
The maximum number of encoder increments results from the max. permissible input frequency and the required maximum drive speed. If the maximum motor speed nmax = 3000 rpm and the encoder is directly mounted on the motor, the maximum encoder resolutions will be as follows (in brackets, typically recommended number of increments of an HTL encoder):
- 8400 StateLine C (digital input DI1/2): max. input frequency 10.24 kHz -> max. number of encoder increments = 204 inc./rev. (typical number of increments: 128 inc./rev.)
- 8400 HighLine C with firmware ≤V10.x and 8400 TopLine C with firmware ≤V1.x (DI1/2): max. input frequency 102.4 kHz -> max. number of encoder increments = 2048 inc./rev. (typical number of increments: 1024 inc.)
- 8400 HighLine C with firmware ≥V11.x und 8400 TopLine C with firmware ≥V2.x (DI1/2): max. input frequency 204.8 kHz -> max. number of encoder increments = 4092 inc./rev.
- 8400 HighLine/TopLine C (DI6/7): max. input frequency 10.24 kHz -> max. number of encoder increments = 204 inc./rev. (typical number of increments: 128 inc.)
Note:
When the encoder is mounted on the gearbox output side, the number of encoder increments must be divided by the gearbox factor!
The indicated maximum input frequency considers required control reserves (speed overshoots).
