5
Modbus TCP with FHPP
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Festo – EMCA-EC-C-HP-EN – 2017-11e – English
5
Modbus TCP with FHPP
Modbus TCP is an open communication protocol based on the master-slave architecture. It is an
established standard for communication via Ethernet-TCP/IP in automation technology.
The basic function of Modbus TCP is described in IEC 61158.
The standard port for Modbus TCP is 502.
The Ethernet control interface is used parallel to the Ethernet parameterisation interface
(FestoConfiguration Tool (FCT), web server). A maximum of
one
Modbus TCP connection at a time is
possible.
After the TCP connection has been made, it is normally kept open and only disconnected by the EMCA
incase of error, with a timeout set or through the counterpart station.
Communication with the FCT and the web server remains possible.
Data encoding
Modbus TCP/IP uses a “big-endian” transmission sequence. The most significant byte (MSB)
(
è
page 125) is sent first. The data is always processed as a register (2 bytes/word). Onthe control
side, it may be necessary to “turn” these 2 bytes. This affects the Modbus commands (Function code):
0x03, 0x10, 0x17
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This already takes place through the module if provided by Festo.
Содержание EMCA-EC-67 CO Series
Страница 33: ...2 CANopen Festo EMCA EC C HP EN 2017 11e English 33 ...
Страница 73: ...3 EtherCAT with FHPP Festo EMCA EC C HP EN 2017 11e English 73 ...
Страница 87: ...4 EtherNet IP with FHPP Festo EMCA EC C HP EN 2017 11e English 87 ...
Страница 113: ...6 PROFINET IO with FHPP Festo EMCA EC C HP EN 2017 11e English 113 ...
Страница 116: ...7 FHPP 116 Festo EMCA EC C HP EN 2017 11e English ...
Страница 140: ...8 FHPP standard data I O data 140 Festo EMCA EC C HP EN 2017 11e English ...
Страница 148: ...9 Measuring reference system 148 Festo EMCA EC C HP EN 2017 11e English ...
Страница 210: ...10 Control via FHPP 210 Festo EMCA EC C HP EN 2017 11e English ...
Страница 223: ...11 Monitoring of the drive behaviour Festo EMCA EC C HP EN 2017 11e English 223 ...
Страница 367: ...D CANopen communication Festo EMCA EC C HP EN 2017 11e English 367 ...
Страница 402: ...F Diagnostics and fault clearance 402 Festo EMCA EC C HP EN 2017 11e English ...
Страница 413: ...EMCA EC 67 CO DIO EC EP PN Festo EMCA EC C HP EN 2017 11e English 413 ...
Страница 414: ...EMCA EC 67 CO DIO EC EP PN 414 Festo EMCA EC C HP EN 2017 11e English ...
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