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Chapter 8 Communication Functions
8-20
(5) Example
This example supposes that 2 byte H’AA15 is written in D000 of station No. 1 and BCC value is checked.
① Computer request Format (PC → MASTER-K120S main unit)
Format name Header
Station
No.
Command
Command
type
Device
Length
Device
Number of
data
Data Tail
Frame
check
Frame (Example)
ENQ H01 w SB H06 %DW0000 H01 HAA15056F EOT BCC
ASCII value H05 H3031 H77 H5342 H3036 H254457303030 H3031
H414131353
0353646
H04
② For ACK response after execution of command (PC ← MASTER-K120S main unit)
Format name Header Station No. Command Command type
Tail Frame check
Frame (Example)
ACK H01 W SB ETX BCC
ASCII value H06 H3031 H77 H5342 H03
③ For NAK response after execution of command(PC ← MASTER-K120S main unit)
Format name Header Station No. Command Command type
Error code Tail Frame check
Frame (Example)
NAK 01 W SB
Error code
(2) ETX BCC
ASCII value H15 H3031 H77 H5342
Error code
(4) H03