CARLO GAVAZZI EM21 - COMMUNICATION PROTOCOL V1 REV0 Manual de usuario descargar pdf (Pagina 2)

Index

1.1

Introduction ........................................................................................................................................... 3

1.2

MODBUS functions ............................................................................................................................... 3

1.2.1

Function 03h (Read Holding Registers) .............................................................................. 3

1.2.2

Function 04h (Read Input Registers) .................................................................................. 4

1.2.3

Function 06h (Write Single Holding Register) ..................................................................... 4

1.2.4

Function 08h (Diagnostic with sub-function code 00h) ........................................................ 5

1.2.5

Broadcast mode .................................................................................................................. 5

1.3

Application notes ................................................................................................................................... 6

1.3.1

RS485 general considerations ............................................................................................ 6

1.3.2

MODBUS timing .................................................................................................................. 6

TABLES ......................................................................................................................................... 7

2.1

Data format representation In Carlo Gavazzi instruments .................................................................... 7

2.1.1

Geometric representation .................................................................................................... 7

2.2

Maximum and minimum electrical values in EM21 ............................................................................... 7

2.3

Instantaneous variables and meters ..................................................................................................... 8

2.4

Firmware version and revision code ..................................................................................................... 8

2.5

Programming lock status....................................................................................................................... 8

2.6

Carlo Gavazzi Controls identification code ........................................................................................... 9

2.7

Programming parameter tables ............................................................................................................. 9

2.7.1

Password configuration menu ............................................................................................. 9

2.7.2

“Application” menu ............................................................................................................... 9

2.7.3

System configuration menu ................................................................................................. 9

2.7.4

PT and CT configuration menu ............................................................................................ 9

2.7.5

Pulse output configuration menu ....................................................................................... 10

2.7.6

Serial port configuration menu ........................................................................................... 10

2.7.7

Reset commands............................................................................................................... 10

2.7.8

Serial number .................................................................................................................... 10

2.7.9

Note ................................................................................................................................... 10

REVISIONS .................................................................................................................................. 10

3.1

Modifications from Version 1 Revision 0 ............................................................................................. 10

3.2

Modifications from Version 1 Revision 1 ............................................................................................. 10

1 2 3 4 5 6 7 8 9 10

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CARLO GAVAZZI EM21 - COMMUNICATION PROTOCOL V1 REV0 Manual de usuario Pagina 2

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