JVL MIS23 Series, User Manual

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166 JVL Industri Elektronik A/S - User Manual - Integrated Stepper Motors MIS23x, 34x, 43x
8.3 MIS34x & MIS43x Registers
8.3.31 Home mode
Description: Selects the zero search that should start on power up.
A value of 13 will use sensor type 1, while a value of 14 will use sensor type 2.
8.3.32 Absolute encoder position
Description: Description for the H2 encoder option:
This is the absolute magnetic encoder position, this is only a singlet turn value and the
resolution is 10bit. That is 360 degree/1023 = 1 count = approximately 0.35 degree.
8.3.33 SSI encoder value
Description: This is the actual encoder position data received from the external SSI encoder.
Some SSI encoders output Gray coded values. The firmware offers the possibility to do
the Gray code to binary conversion before updating the EXTENCODER register with
the actual position.
Example: An SSI encoder outputs the position in binary.
We want to sample, and update the EXTENCODER register 47 without any conversion.
This can be done by use command 321.
If the SSI encoder outputs the position in Gray code, the value can be converted to binary
before updating the EXTENCODER register by using command 322 instead.
For further description of the external encoder interface using SSI format please consult
The SSI interface principle of operation. , page 82
Reg Name Size Access Range Default Unit MacTalk name
42
HOMEMODE 32bit R/W 0,13,14 0 - Zero Search Mode
Reg Name Size Access Range Default Unit MacTalk name
46
ABSENCODER 32bit R
H2 (0-1023)
H3 (xxxx)
0 -
Absolute Encoder
Position
Reg Name Size Access Range Default Unit MacTalk name
47
EXTENCODER 32bit R
(-2
31
)-(2
31
-1)
0 - SSI Encoder Value