User`s manual

229
CHAPTER 9 CONTENTS AND REGISTRATION OF THE USER FRAMES FOR DATA COMMUNICATION
9
9.1 User Frame Types and Contents During Communication
(In the case of the example [Range 2]) (H) (L)
02H + 00H + 3BH + 41H + 31H + ABH + 12H + 03H = 016FH
6) Transmission/reception data corresponding to register code FFH+E5H
The sum check code resulted from the calculation of the transmission/reception data (message) codes except
the first one frame and last one frame is expressed as the ASCII code data and transmitted or received.
• How to calculate the sum check code
Lower one byte of the sum check value calculated is converted into 2-digit ASCII code data, and used for data
transfer.
Arrangement of data when received
7) Transmission/reception data corresponding to register code FFH+EBH
The sum check code resulted from the calculation of the transmission/reception data (message) codes,
including the first one frame and excluding the last one frame, is expressed as the ASCII code data and
transmitted or received.
• How to calculate the sum check code
Lower one byte of the sum check value calculated is converted into 2-digit ASCII code data, and used for data
transfer.
Arrangement of data when received
Register code Data contents transmitted and received (arrangement)
FFH, F4H 01H and 6FH are transmitted and received, beginning from 6FH.
FFH, F6H 6FH is transmitted and received.
FFH, F7H "6" and "F" are transmitted and received, beginning from "6".
FFH, F9H "F" is transmitted and received.
011770 30
02H 30H
02H
03H
03H FFH+E5H
31H 31H 37H 37H 30H 33H 30H
30H+31H+31H+37H+37H+30H
=130H
S
T
X
E
T
X
User frame
(First frame)
User frame
(Last frame)
Arbitrary data
User frame register
code
Transmission/
reception data code
Read data
Calculation range
Sum
check
code
Station
No.
011770 32
02H 30H
02H
03H
03H FFH+EBH
31H 31H 37H 37H 30H 33H 32H
02H+30H+31H+31H+37H+37H+30H
=132H
S
T
X
E
T
X
User frame
(First frame)
Station
No.
User frame
(Last frame)
Arbitrary data
User frame register
code
Transmission/
reception data code
Read data
Calculation range
Sum
check
code