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RS232 - Interface

BC8050 und BC8150 69Version: 3.0.0

6.1.1.5.4 Function 6: writing an analog output

Function 6 can be used to access the output process image and the interface.

The first analog output is written with function 6. The analog outputs start at an offset of 0x0800. Here again

the offset always describes a word. This means offset 0x0803 refers to the fourth word in the output process

image.

Query

Byte Name Modbus RTU Modbus ASCII

Start - frame - - ":" 0x3A

Address 11 0x0B "0B" 0x30, 0x42

Function code 6 0x06 "06" 0x30, 0x36

Start address high 8 0x08 "08" 0x30, 0x36

Start address low 0 0x00 "00" 0x30, 0x30

Data high 63 0x3F "3F" 0x33, 0x46

Data low 255 0xFF "FF" 0x46, 0x46

Error check, LRC/

CRC

0xDA, 0xB0 "A9" 0x41, 0x39

End - frame t1-t2-t3 CRLF 0x0D, 0x0A

The Fieldbus Coupler Box responds with the same telegram and confirmation of the received data.

Response