ADF Web HD67506M Посібник користувача - Сторінка 13
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Industrial Electronic Devices
The Bytes that composed the respons are these:
The "Status of operation" (Byte Number 1) can have these values:
0xFF: Ok;
0xFE: Different from Write;
0xFC: Writing but function different from 5,6,15,16;
0xFB: The slave interrogated hasn't replied in the TimeOut time;
0xFA: The reply CRC is wrong;
0xF9: Returned function is different from the one requested;
0xF7: Number of byte less than 9;
0xF6: Number of data to wrote is different from 1 or the frame length is wrong if the function is 5,6;
0xF5: Number of data to wrote is less than 1 or the frame length is wrong if the function is 15,16;
0x03: Illegal data value, the value referenced in the data field is not allowable in the addressed slave location;
0x02: Illegal data address, the address referenced in the data field is not an allowable address for the addressed slave device;
0x01: Illegal function, the message function received is not an allowable action for the addressed slave.
Examples:
1) We want to write two points with the following features:
Type of Data: Holding Register; Device Address: 5; Start Address: 0x0115; Number of Point: 2; Data 1: 0x1122; Data 2: 0x3344.
So the string of hexadecimal numbers is:
REQ:[02][10][05][01][15][00][02][11][22][33][44]
RES:[FF]
2) We want to set to 1 the Coil Status at address 0x115:
Type of Data: Coil Status; Device Address: 5; Start Address: 0x0115; Number of Point: 1; Data 1: 0xFF00.
So the string of hexadecimal numbers is:
REQ:[02][05][05][01][15][00][01][FF][00]
RES:[FF]
ADFweb.com S.r.l.
Byte Number
Description
1
Status of operation
User Manual Modbus Master / Ethernet
Document code: MN67506_ENG
Revision 1.012
Page 13 of 18