4-4
Section
Types of Commands and Responses
42
4-4-9 Command Processing Terminating Command (AA)
Terminates the processing of the commands other than the polling commands
and restores the command wait status. Can also terminate the communication
of frames of an expansion command.
Command Format
A
A
CR
Header
∗
Terminator
Response Format
A
A
X
X
CR
Header
Terminator
∗
End code
End code
Meaning
14
Processing of auto or ordinary command is not executed.
75
Expansion command has not been received yet, sync input has not become active yet, or command
execution has been terminated before DC is detected.
76
When DC read/write processing is terminated.
4-4-10 Data Check Command (MD C/K)
Writes a CRC code and executes data collation in a check block specified by the
user. A CRC code is calculated with the generating function X
16
+ X
12
+ X
5
+1.
The number of check block bytes required is the number of bytes of the check
code calculation area plus two bytes. Refer to 5-5 Checking Function of the Data
Carrier’s Memory for details.
1-to-1 Procedure
Command Format
M
D
C/K
1
X
X
X
X
X
X
CR
Header
Processing specification
(C: Collation; K: Calculation)
Read/Write head word (fixed to 1
Check block first address
Specifies a hexadecimal value
(03
H
, 04
H
,..., FE
H
, FF
H
, 00
H
) for
the number of overwriting opera-
tions to be added.
00
H
means 256 bytes.
∗
Response Format
M
D
0
0
CR
∗
End code
00: Normal completion (at the time of calculation processing only)
75: Normal data (at the time of collation processing only)
76: Data abnormal warning (at the time of collation processing only)
Header
