Toshiba AS311 - Manual (Page 40)

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ASCII Interface Module (AS311)
5. Operation Procedure
5.1 Transmission message format
The transmission message is composed by ASCII characters and a specified trailing
code. The default setting of the trailing code is CR (carriage return code = H0D).
Refer to section 5.6 for setting the trailing code other than CR.
The maximum length of a message is 896 bytes. An example of the message is
shown below.
1 2 3 4 5 6 7 8 9
″
0
″ ″
1
″ ″
2
″ ″
A
″ ″
B
″ ″
7
″ ″
8
″ ″
9
″
CR
In the above figure,
″
x
″
means an ASCII character. For example,
″
0
″
is H30.
When the above message is received or transmitted, the data arrangements in the
T3 registers are as follows.
Register F 8 7 0
n
″
1
″ ″
0
″
n+1
″
A
″ ″
2
″
n+2
″
7
″ ″
B
″
n+3
″
9
″ ″
8
″
n+4 CR
Transmission message
″
0
″
″
1
″
″
2
″
″
A
″
″
B
″
″
7
″
″
8
″
″
9
″
CR