Delta DVP-ES2 User Manual download pdf (Page 408)

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DVP-ES2/EX2/SS2/SA2/SX2/SE Operation Manual - Programming

3-292

LRC checksum: 01 H + 03 H + 07 H + 08 H + 00 H + 06 H = 19 H. Operate 2’s complement on 19H

and the result is E7H. Store ‘E’(45 H) in the low byte of D113 and ‘7’ (37 H) in the low byte of D114.

Remarks:

ASCII mode communication data:

STX ‘: ’ Start word = ‘: ’ (3AH)

Address Hi ‘ 0 ’

Address Lo ‘ 1 ’

Communication:

8-bit address consists of 2 ASCll codes

Function Hi ‘ 0 ’

Function Lo ‘ 3 ’

Function code:

8-bit function consists of 2 ASCll codes

‘ 2 ’

‘ 1 ’

‘ 0 ’

‘ 2 ’

‘ 0 ’

DATA (n-1)

…….

DATA 0

‘ 2 ’

Data content:

n × 8-bit data consists of 2n ASCll

codes

LRC CHK Hi ‘ D ’

LRC CHK Lo ‘ 7 ’

LRC checksum:

8-bit checksum consists of 2 ASCll codes

END Hi CR

END Lo LF

End word:

END Hi = CR (0DH), END Lo = LF(0AH)

LRC checksum: Operate 2’s complement on the summed up value from communication address

to the end of data, i.e. 01 H + 03 H + 21 H + 02 H + 00 H + 02 H = 29 H, the operation result of 29H

is D7H.

1 2 ... 403 404 405 406 407 408 409 410 411 412 413 ... 701 702

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Delta DVP-ES2 User Manual Page 408

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