44
To ensure data integrity, data transfer between the data carrier and read/write device can be
monitored using a CRC_16 data check.
With the CRC_16 data check, a checksum is written to the data carrier which enables the data
to be checked for validity at any time.
Advantages of the CRC_16 data check:
– Very high data integrity, even during the non-active phase (data carrier outside the read/write
head)
Restrictions of the CRC_16 data check:
– Longer write times, as the CRC must also be written.
– User data capacity is sacrificed.
(see table on page 23)
.
Note
The CRC_16 data check can only be used in combination with data carriers that have
been appropriately initialized. If a data carrier is not initialized and this parameter is
nevertheless set, CRC errors occur during reading and writing
(see chapter 9.5 "Error
.
The data carriers can be initialized for using CRC16 with command designator 12
hex
.
The checksum is written on the data carrier as 2 bytes (per block) of information. Thus, 2 bytes
of user data is lost per block.
The following figure applies for this parameter:
Index 40
hex
, subindex 1
hex
- 1 byte
00
hex
CRC_16 data check is not used (default setting)
01
hex
CRC_16 data check is used
If dynamic mode is activated, a job can be sent even if no data carrier is located in the read/write
range of the read/write head, which would result in errors without dynamic mode. The job is then
stored and is executed as soon as a data carrier is detected.
The following figure applies for this parameter:
Index 40
hex
, subindex 2
hex
- 1 byte
00
hex
Dynamic mode not activated (default setting)
01
hex
Dynamic mode activated
7.2 Mapping of
Parameter Data
CRC_16
Data check
Dynamic mode
7
Configuring the Read/Write Device
BIS M-4 _ _ IO-Link Device
Read/Write Device
Содержание BIS M-4 045 0 07-S4 Series
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Страница 3: ...Technische Beschreibung Betriebsanleitung deutsch BIS M 4_ _ 045 _0_ 07 S4 BIS M 4_ _ 072 _0_ 07 S4...
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Страница 69: ...Technical Description Operating Manual english BIS M 4_ _ 045 _0_ 07 S4 BIS M 4_ _ 072 _0_ 07 S4...
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Страница 138: ...4 BIS M 4_ _ IO Link 7 43 7 1 43 7 2 44 7 3 45 8 46 9 47 9 1 47 9 2 48 9 3 52 9 4 53 9 5 58 9 6 59 62 62 62 ASCII 63...
Страница 139: ...www balluff com 5 8 UL 3TLJ E227256 IC RSS 1 2 FCC FCC 15 1 2 BIS M 4_ _ IO Link 1 1 1 2 1 BIS M 4_ _ IO Link...
Страница 141: ...www balluff com 7 1 BIS CRC DPP EMC LSB MSB PC SIO IO SPDU PLC TCP 1 6 1 7 BIS M 4_ _ IO Link...
Страница 142: ...8 BIS M 4xx_ _ BIS M EMC A IO Link BIS M 4_ _ 24 A 2 1 2 2 2 3 2 BIS M 4_ _ IO Link...
Страница 152: ...18 3 IO Link M12 A 1 24 V 2 3 GND 4 C Q 2 2 2 IO Link IO Link RC 3 2 BIS M 4_ _ IO Link...
Страница 153: ...www balluff com 19 BIS M BIS M IO Link 16 1 IO Link 2 3 4 IO Link IO Link PC PLC 4 1 4 BIS M 4_ _ IO Link...
Страница 156: ...22 4 CRC_16 CRC_16 CRC_16 CRC_16 CRC 23 CRC_16 44 7 2 8 BIS M 4_ _ 045 30 BIS M 4_ _ 072 4 5 4 6 BIS M 4_ _ IO Link...
Страница 180: ...46 IO Link BIS M IO Link 10 BIS M 4_ _ 045 00_ 07 S4 32 BIS M 4_ _ 072 00_ 07 S4 8 BIS M 4_ _ IO Link...
Страница 192: ...58 01hex 02hex 03hex 04hex 05hex 07hex AV 00hex 0Ehex CRC CRC 0Fhex 48 20hex 21hex AV 9 5 9 BIS M 4_ _ IO Link...
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