Transmission Procedure - Toshiba V Series User Manual

Chapter 2 Specifications

2.2 Transmission Procedure

2
8
The ASCII module transmission method is commonly used in personal computers. A
general method uses the following polling method and commonly uses CR (0DH) as the
trailing code.
Send
Text
Receive
(1) Transmitted text
To transmit data using the ASCII module, create an ASCII code text data as shown
below and write it in the transmitting area of the ASCII module with an MWRITE
instruction.
• Be sure to add a trailing code
(CR) at the end of the
transmitted text.
• The transmitted text can be up to
448w.
(2) Received text
When data is received with the ASCII module, read the ASCII code text data as
shown below with the MREAD instruction.
• The text up to the trailing code
(CR) is received.
• Text up to 448w can be received.
• The received byte length is
stored in the 19W/83W
parameters.
CR
Text CR
S3 register
F
"1" "0"
"3" "2"
"5" "4"
"7" "6"
"9" "8"
NULL CR
HIGH LOW
byte byte
S3 register
F
"1" "0"
"3" "2"
"5" "4"
"7" "6"
"9" "8"
NULL CR
HIGH LOW
byte byte
Received bytes (N)
model 3000 ASCII Module (AS311) User's Manual
Text CR
Transmitted text
0
"0"
"1"
"2"
"3"
"4"
N bytes
"5"
"6"
"7"
"8"
"9"
CR
Received text
0
"0"
"1"
"2"
"3"
"4"
N bytes
"5"
"6"
"7"
"8"
"9"
CR