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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