IC-MN Datasheet, PDF(39/59 Page) IC-Haus GmbH – 25-BIT NONIUS ENCODER WITH 3-CH. SAMPLING 13-BIT Sin/D INTERPOLATION

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IC-MN Datasheet, PDF (39/59 Pages) IC-Haus GmbH – 25-BIT NONIUS ENCODER WITH 3-CH. SAMPLING 13-BIT Sin/D INTERPOLATION

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iC-MN 25-BIT NONIUS ENCODER

WITH 3-CH. SAMPLING 13-BIT Sin/D INTERPOLATION

Rev D1, Page 39/59

Output Data Length

The output bit count is derived from the parameters

DL_ST, M2S and DL_MT. In accordance with the se-

lected protocol two additional bits for the error and

warning messages are always transmitted.

The output bit length for singleturn data can be set in-

dependent of the internal converter resolution. For bit

lengths which exceed the internal word length the data

following the LSB is zero ï¬lled. If enabled by M2S mul-

titurn data is always transmitted before singleturn data.

The code direction of the output data word can be al-

tered using pin DIR or register DIR. Both signals are

EXOR-gated and together comprise the internal direc-

tion of rotation signal.

DIR

Code

Addr. 0x3D; bit 6

Direction of rotation

Not inverted

Inverted

Table 62: Inversion of code direction

DL_ST

Code

0x00

...

0x05

...

0x11

0x12

...

0x19

0x1A

Addr. 0x3E; bit 4:0

Bit count

8 bit +2 bit for E/W

...

13 bit +2 bit for E/W

...

25 bit +2 bit for E/W

Bit counts listed below are valid only for multiturn

synchronization mode (see P. 30)

26 bit +2 bit for E/W

...

33 bit +2 bit for E/W

39 bit +2 bit for E/W

For reasons of data security iC-MN provides ï¬xed CRC

polynomials (see Table 63). The CRC start value can

be freely selected, thus enabling a PLC to clearly allo-

cate data to the source (for safety applications). Reg-

ister communication can be optionally blocked by pa-

rameter NC_BiSS.

Data

Channel

SCD

CDM, CDS

CRC

HEX Code

0x43

0x13

Polynomial

x6+x1+x0

x4+x1+x0

Calculation

Start Value

see CID_SCD

0x0

Table 63: BiSS CRC polynomials

Table 59: ST Data length

M2S

Code

Addr. 0x3F; bit 2:1

Function

No output

MT data output of lowest 4 bits

MT data output of lowest 8 bits

Complete output, MT bit count following DL_MT

Table 60: MT Data output

Output Options

The Gray or binary code format option covers the sin-

glecycle word in its entirety (MT and ST data); only

ï¬lled in zeros and the error and warning bits remain

unaltered.

CID_SCD

Code

0x00

...

0x0F

Addr. 0x4C; bit 7:4

CRC start value SCD

CID_SCD

Table 64: CRC start value for SCD

NC_BISS

Code

Notes

Addr. 0x43; bit 2

Function

BiSS C register communication enabled

Communication disable

(no execution of commands, no access to RAM or

EEPROM

If the device setup and a set communication disable

NC_BiSS are to be stored to the EEPROM, the

preset function can be triggered at pin PRES.

GRAY_SCD

Addr. 0x3F; bit 7

Code

Data format

Binary coded

Gray coded

Table 65: Communication disable

Table 61: Data format (covers MT and ST data)

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