Mitsubishi Electric Melsensor CF26-LR, Руководство по настройкам

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8 Application Steps
8.3 Application Details
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8
Decode Settings
For trigger types whose codes are read by external trigger inputs, triggers can be input at the required timing. For example,
when a code reader reads a code from a target object flowing on a conveyor, the code can be read by inputting triggers at the
appropriate timing. However, when the code reader generates triggers internally for reading codes, it cannot be triggered at
an arbitrary timing; the same target object code may be read multiple times. The following can be set to prevent the
occurrence of such an event.
Never Read Same Code Twice
This setting prohibits the code reader to read the same code continuously.
Don't Reread Last N Codes
When reading multiple types of codes, N codes read from the last are not read again. The example is shown as below. When
setting 2 for N, the three different types of codes (A,B, and C) are read by the following operation.
OK OK
NG NG
OK OK
The first time
A is read
The third time
A is read
The sixth time
A is read
The fifth time
C is read
The fourth time
B is read
The second time
B is read
Read OK Read OK
This code is not read
because A is included
in the last two codes
which have been read
successfully.
This code is not read
because B is included
in the last two codes
which have been read
successfully.
This code is read
because C is not
included in the last two
codes which have been
read successfully.
This code is read
because A is not
included in the last two
codes which have been
read successfully.