User's Manual

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8.2 Parameterization

data mapping

CRC check

Data carrier

Setting the processor parameters

BIS L-409 IO-Link Device

Processor

Address 10hex, CRC_16 check

The CRC check is a procedure for determining a check value in order to be able to recognize

data transmission errors. If the CRC check is activated, an error message is sent when a CRC

error is detected.

(If the parameter CRC_16 data check is set, then in addition to the data carrier data, a 2-byte

CRC_16 checksum is checked (see “Data integrity” on page 15). The data compare counter is

automatically set to one-time reading. Detection of a data carrier arriving in the read zone then

takes a maximum of 70 ms.

Note

The CRC_16 data check can only be used with data carriers of type BIS L-10X-05/L.

The data carriers must be initialized using a BIS L-60_ _ processor and the

BISCOMRW.EXE PC software or a portable reader BIS L-81_ (refer to the User's

guide for the corresponding device for this procedure).

Checksum

The checksum is written to the data carrier as 2 bytes of information. This means 2 bytes of user

data per block are sacrificed.

1 byte, Address 10hex

MSB 6 5 4 3 2 1 LSB

(not relevant) 1/0

Bit 0 (LSB) = 0: no CRC check (default setting)

Bit 0 (LSB) = 1: CRC Check

Address 11hex, BIS L-10x-05

Note

If type BIS L-10X-05 data carriers are used, parameter “BIS L-10x-05” must be

activated.

1 byte, Address 11hex

MSB 6 5 4 3 2 1 LSB

(not relevant) 1/0

Bit 0 (LSB) = 0: No type BIS L-10x-05 data carrier is used (default setting)

Bit 0 (LSB) = 1: A type BIS L-10x-05 data carrier is used