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FieldTalk Modbus Master Library, Delphi Edition
Library version 2.12.0
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Modbus® exception response. More...
Modbus® exception response.
Signals that a Modbus exception response was received. Exception responses are sent by a slave device instead of a normal response message if it received the query message correctly but cannot handle the query. This error usually occurs if a master queried an invalid or non-existing data address or if the master used a Modbus function which is not supported by the slave device.