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EnDat at Channel 1
GB - 10
3.3.6
Encoder line length
The maximum line length is 50 m. It results from the voltage drop of the supply line. The
value is calculated as follows:
Encoder cable length =
U - U
min
––––––––––
I
max
• 2 • R
max. encoder current I
max
: see encoder description
Supply voltage U: 5,25 V
min. supply voltage U
min
: 4,75 V
KEB encoder cable resistance R:
0,036 Ω/m at 0,5 mm²
3.3.7
Tested encoders
The following EnDat encoder have been tested by KEB on it application:
Encoder description
EnDat-reference (Ec.36)
ECN 1313 single-turn
49
EnDat single-turn
ECI 1317 Singleturn
49
EnDat single-turn
ROQ 425 multi-turn
50
EnDat multi-turn
EQI 1329 Multiturn
50
EnDat multi-turn
Linear measurement system LC 481
51
EnDat linear
However, this does not restrict the use of rotary encoder with same specifications of other
manufacturers.
4. Start-up
After the installation or exchange of an encoder interface some adjustments of the inverter/
servo software have to be done before operation:
•
Switch on inverter
•
Select application mode
•
When using synchronous motors set ud.2 to F5-S
•
Select parameter Ec.0 and control whether „EnDat“ is entered. The displayed value
has to be confirmed by „ENTER“ in any case.
•
Select parameter Ec.10 and carry out the same for the 2. encoder interface
•
Select parameter Ec.1 and control/adjust the increments per revolution
•
Select parameter Ec.38; if automatic read in is not adjusted in Bit 2, read out encoder
data with Bit 0.
•
Select parameter Ec.37 and control encoder status.
4.1
EnDat® parameter
The following parameters are stored in the EnDat® encoder and automatically read in
e.g.manually read/write by Ec.38:
Synchronous motors: dr.23…dr.28, dr.30…32
Asynchronous motors: dr.0…dr.7
Encoder parameter:
Ec.1…3, In.31…32
Controller parameter: cS.19