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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