Delta AS Series Programming Manual page 817

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Example 2: Read the parameter of gain trim green channel on the first device of the second communication port.
1. Check HWCONFIG to learn the setting value in gain trim green channel is "-63".
2. AS04SIL is the first module that installed on the right side of the PLC CPU. The setting value in Group is 0, 1 in
Module and 2 in Port.
_6 3. We learnt that its index is 72, its Sub-index is 0, and the data type is IntegerT from its IODD file or the IO-Link device
manual. Set the setting values in Index to 72, in Sub-index to 0, in data type to 2 (IntegerT).
4. Start sending "to read" request when M0 is ON. When M10 (DONE) is ON, it indicates the device has responded
and has complete reading. ReadLen (D40) is 1, and the data is stored in DataRead (D50 Low Byte). IO-Link device
reads the data and stores it in accordance with the order of high byte and low byte.
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