P12x /EN CT/A96
Communications
MODBUS DATABASE
Page 4/248
MiCOM P120/P121/P122/P123
2. MODBUS
PROTOCOL
MiCOM P120, P121, P122
and
P123
relays can communicate by a RS 485 link behind the
unit following the MODBUS RTU protocol.
2.1
Technical characteristics of the MODBUS connection
2.1.1
Parameters of the MODBUS connection
The different parameters of the MODBUS connection are as follows:
−
Isolated two-point RS485 connection (2kV 50Hz),
−
MODBUS line protocol in RTU mode
−
Communication speed can be configured by an operator dialog in the front panel of
the relay:
Baud rate
300
600
1200
2400
4800
9600
19200
38400
Transmission mode of the configured characters by operator dialog
Mode
1 start / 8 bits / 1 stop: total 10 bits
1 start / 8 bits / even parity / 1 stop: total 11 bits
1 start / 8 bits / odd parity / 1 stop: total 11 bits
1 start / 8 bits / 2 stop: total 11 bits
2.1.2
Synchronisation of exchanges messages
All character received after a silence on the line with more or equal to a transmission time of
3 characters is considered as a firm start.
2.1.3 Message
validity
check
The frame validity is working with a cyclical redundancy code CRC with 16 bits.
The generator polynomial is:
1 + x² + x
15
+ x
16
= 1010 0000 0000 0001 binary = A001h
2.1.4
Address of the MiCOM relays
The address of the MiCOM relay on a same MODBUS network is situated between 1 and
255. The address 0 is reserved for the broadcast messages
Содержание MiCom P120
Страница 1: ...MiCOM P120 P121 P122 P123 Overcurrent Relays Version 11 Technical Guide P12X EN T A96...
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Страница 4: ...P12x EN T A96 Technical Guide Contents Page 2 2 MiCOM P120 P121 P122 P123 BLANK PAGE...
Страница 13: ...Introduction P12x EN IT A96 MiCOM P120 P121 P122 P123 INTRODUCTION...
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Страница 16: ...P12x EN IT A96 Introduction Page 2 8 MiCOM P120 P121 P122 P123 BLANK PAGE...
Страница 22: ...P12x EN IT A96 Introduction Page 8 8 MiCOM P120 P121 P122 P123 BLANK PAGE...
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Страница 26: ...P12x EN IN A96 Handling Installation and Case Dimensions Page 2 10 MiCOM P120 P121 P122 P123 BLANK PAGE...
Страница 35: ...User Guide P12x EN FT A96 MiCOM P120 P121 P122 P123 USER GUIDE...
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Страница 108: ...P12x EN FT A96 User Guide Page 72 72 MiCOM P120 P121 P122 P123 BLANK PAGE...
Страница 109: ...Menu Content Tables P12x EN HI A96 MiCOM P120 P121 P122 P123 MENU CONTENT TABLES...
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Страница 112: ...P12x EN HI A96 Menu Content Tables Page 2 68 MiCOM P120 P121 P122 P123 BLANK PAGE...
Страница 179: ...Technical Data P12x EN TD A96 MiCOM P120 P121 P122 P123 TECHNICAL DATA AND CHARACTERISTIC CURVES...
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Страница 221: ...Application Guide P12x EN AP A96 MiCOM P120 P121 P122 P123 APPLICATION GUIDE...
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Страница 305: ...Communications P12x EN CT A96 MiCOM P120 P121 P122 P123 MODBUS DATABASE MiCOM P120 P121 P122 P123 VERSION V11 A...
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Страница 367: ...Communications P12x EN CT A96 MiCOM P120 P121 P122 P123 COURIER DATABASE MiCOM P120 P121 P122 P123 VERSION V11 A...
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Страница 514: ...P12x EN CT A96 Communications COURIER DATABASE Page 146 248 MiCOM P120 P121 P122 P123...
Страница 515: ...Communications P12x EN CT A96 MiCOM P120 P121 P122 P123 IEC 60870 5 103 MiCOM P120 P121 P122 P123 VERSION V11 A...
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Страница 518: ...P12x EN CT A96 Communications IIEC 60870 5 103 Page 2 248 MiCOM P120 P121 P122 P123 BLANK PAGE...
Страница 536: ...P12x EN CT A96 Communications IEC 60870 5 103 Page 20 248 MiCOM P120 P121 P122 P123...
Страница 537: ...Communications P12x EN CT A96 MiCOM P120 P121 P122 P123 DNP 3 0 DATABASE MiCOM P120 P121 P122 P123 VERSION V11 A...
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Страница 540: ...P12x EN CT A96 Communications DNP 3 0 Database Page 2 248 MiCOM P120 P121 P122 P123 BLANK PAGE...
Страница 553: ...Commissioning and Maintenance P12x EN CM A96 MiCOM P120 P121 P122 P123 COMMISSIONING AND MAINTENANCE GUIDE...
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Страница 573: ...Connection Diagrams P12x EN CO A96 MiCOM P120 P121 P122 P123 CONNECTION DIAGRAMS...
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Страница 579: ...Commissioning Test Record Sheets P12x EN RS A96 MiCOM P120 P121 P122 P123 COMMISSIONING TEST RECORD SHEETS...
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Страница 582: ...P12x EN RS A96 Commissioning Test Record Sheets Page 2 60 MiCOM P120 P121 P122 P123 BLANK PAGE...
Страница 640: ...P12x EN RS A96 Commissioning Test Record Sheets Page 60 60 MiCOM P120 P121 P122 P123 BLANK PAGE...
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Страница 644: ...P12x EN VC A96 Hardware Software Version History and Compatibility Page 2 26 MiCOM P120 P121 P122 P123 BLANK PAGE...
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