Read - turck TN-IOL2 Series Instructions For Use Manual

9.3.5

Read

With a read operation, the device automatically executes a read command as soon as the status
of the start bit changes (rising or falling edge). The user must manually trigger the switching of
the start bit.
Proceed as follows to execute the command:
„ Set rising edge at START bit.
„ Evaluate the status of the RDY bit.
The RDY status bit behaves in the same way as the edge status of the START bit.
The RDY bit behaves as follows if during the command execution a tag is located in the detec-
tion range of the read/write head:
START
Ò
0 1
Ò
1 0
The RDY bit behaves as follows if during the command execution no tag is located in the detec-
tion range of the read/write head:
START
Ò
0 1
Ò
1 0
V01.00 | 2021/05
RDY Meaning
Ò
Input data present
0 1
Ò Input data present
1 0
RDY Meaning
0 No tag within the detection range
Ò
Tag was or is in the detection range, input data available
0 1
1 No tag within the detection range
Ò Tag was or is in the detection range, input data available
1 0
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