SIEB & MEYER SD2, Перевод оригинальной инструкции

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Default value Response Exemplary data
3 Time (00HHMMSS) 0x000B1E01 = 11:31:01
“s01001v09003”
4 File name [3..0] 0x30313073 = “010s”
5 File name [7..4] 0x30763130 = “0v10”
6 File
name [11..8]
0x33303039 = “3009”
“SFM/SLOF”
7 Comment [3..0] 0x2F4D4653 = „/MFS“
8 Comment [7..4] 0x464F4C53 = „FOLS“
...
22 Comment [63..6
0]
6.2.4 Pattern
The PLC can generate any pattern byte. A new pattern can be sent with each trans‐
mission.
The received pattern is incremented by 1 in the controller and returned with the next
telegram. The PLC can check both patterns.
6.2.5 Check
Check contains the check sum that is calculated from the bytes 0 to 6.
To calculate the check sum the bytes 0 to 6 must be added byte-by-byte and
subtracted from the value 0xFF.
å
=
- =
6
0
0
i
i Byte xFF Check
Byte 0 Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Sum Check = 0xFF − Sum
0x81 0x03 0x01 0x02 0x03 0x04 0xAA 0x38 0xFF − 0x38 = 0xC7
6.3 Examples for Data Transmission
For data transmission adhere to the following order of object accesses:
▶ Write object: 4 bytes (reference value) in object 467
▶ Write object: 4 bytes (control data) in object 468
▶ Read object: 4 bytes (actual value) from object 469
▶ Read object: 4 bytes (status data) from object 470
Fieldbus Communication
W
32 Drive System SD2 - Safety Functions SFM / SLOF
6