KEB COMBIVERT F5 Reference Manual page 60

Sin/Cos - Encoder Connections

60
Technical Data
• Input resistance:
• Process data channel:
• Maximum input frequency:
• Encoder line number:
• Maximum cable length:
• Cable length based on cable resistance
The maximum cable length is calculated as follows:
V - Vmin
Length = =
Imax * R
where
Imax = supply current of encoder [amps]
V = voltage supply of the drive = 5.25V
Vmin = minimum supply voltage of the encoder
R = cable resistance (0.07 Ω/m) for Standard KEB cables
(0.03 Ω/m) for type "L" KEB cables
The following Sin/Cos encoders have been tested for use:
• Heidenhain ERN 1387, 487
However, this does not restrict the use of rotary encoder with the same
specifications as other manufacturers
The recognition of encoder loss or exchange is a software function
and dependent on the encoder type. If the drive senses that the serial
communication to the encoder has stopped, it will trigger the 'Error Encoder
Interface' fault.
If there is an encoder-triggered fault or problems with the encoder
cable, the 'Error Encoder Interface' fault will not clear, the problem
must be diagnosed through parameter LE12. To clear the 'Error
Encoder Interface' fault, it is necessary to go to parameter LE01, press
"Enter," and then press "Enter" again to confirm.
120 Ohm
1Vpp
200 kHz
1...2048 inc
100 m
(based on signal levels, otherwise see below)
5.25V - 4.75V
= 83.3 m
0.2A * 0.03 Ω/m