IC-PVL Datasheet, PDF(17/33 Page) IC-Haus GmbH – LINEAR/OFF-AXIS BATTERY-BUFFERED HALL MULTITURN ENCODER

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IC-PVL Datasheet, PDF (17/33 Pages) IC-Haus GmbH – LINEAR/OFF-AXIS BATTERY-BUFFERED HALL MULTITURN ENCODER

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iC-PVL LINEAR/OFF-AXIS

preliminary

BATTERY-BUFFERED HALL MULTITURN ENCODER

Rev B3, Page 17/33

PCR

Code

0x00

0x01

0x02

...

0xFE

0xFF

Addr. 0x02; bit 7:0

Period counts per revolution

Code + 1

255

256

Table 10: Period counts per (mechanical) revolution

By way of example, assume a magnetic code disc with

32 periods. iC-PVL will make a multiturn count every

32 periods. The synchronization bits are distributed

evenly over these 32 periods, i.e. the disc is divided in

eight sectors.Therefore, one sector consists of 8 peri-

ods. While reading the position information, it looks like

the iC-PVL would be placed above a normal diametri-

cally polarized magnet. This scheme is also valid for

non-binary, decimal or odd counts per revolution.

PCR_OUT

Code

Addr. 0x05; bit 6

Mode

No output of PCR in serial data stream

PCR is transmitted as 8 LSBs of MT data

(Only for PCR > 0x00)

Alternatively, the current magnetic period of the me-

chanical revolution can be transmitted in the serial data

stream with option PCR_OUT = 1. In this mode, the

eight LSBs of the multiturn data are used for PCR out-

put. Unused bits are filled with zeroes. As a conse-

quence, the multiturn counter is limited to 32 bits in this

mode. The multiturn, PCR and synchronization infor-

mation give the exact position of the code disc down to

one eighth of a magnetic period.

Even as iC-PVL is particularly designed for off-axis

scanning of magnetic pole wheels, it can also be used

for on-axis scanning of a diametric cylindrical magnet.

The on-axis scanning mode is activated with the con-

figuration bit ONAX = 1. The sensor circle diameter

is specified in Elec. Char. 106. In this mode, setting

POLEWID to 0x01 is mandatory for differential scan-

ning.

ONAX

Code

Addr. 0x04; bit 2

Magnetic scanning mode

Off-axis (default)

On-axis, differential (POLEWID = 0x01 required)

Table 12: Use off- or on-axis magnetic scanning

Table 11: Period count per revolution output mode

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