A Modbus Client String Record allows reading/writing Modbus file records (client side support for Modbus function codes 20 and 21). The input and output is a string converted to/from a byte array. Writing occurs when the linkable “write” action is fired, and reading occurs when the linkable “read” action is fired.
Use of function codes 20 and 21 in Modbus devices is not typical, and so this object is expected to be infrequently used.
Configuration properties specify:
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File Number — From 0 to 65535.
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Starting Record Number — From 0 to 9999.
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Record Length — From 0 to 65535.
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Write On Input Change — Either false (default) or true.
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Padding — Either Pad with spaces (default) or Pad with nulls.
This component allows you to read and write file records in which data is converted to ASCII characters and displayed as a string.
To use, copy from the modbusAsync or modbusTcp palette and place anywhere under the Modbus client device (note it is not a proxy point—if you put under the device’s Points container it will not be visible in any Modbus Client Point Manager view).