PM 1000168 000 07 Modbus interface SINEAX AMx000 1 / 22
Modbus interface SINEAX AM1000 / AM2000 / AM3000
Content
1 Modbus communic ation ................................................................................. 2
2 Mapping ............................................................................................................ 3
2.1 Address space ................................................................................................... 3
2.2 Used addresses................................................................................................. 4
2.3 Used Syntax ...................................................................................................... 5
3 Device in fo rmation .......................................................................................... 6
3.1 Device identification .......................................................................................... 6
4 Measurements ................................................................................................. 7
4.1 General instantaneous values ........................................................................... 7
4.2 System analysis................................................................................................. 8
4.2.1 Instantaneous values of harmonic analysis (up to version 1.0x.807) ............... 8
4.2.2 Instantaneous values of harmonic analysis (from version 1.0x.875) ................ 9
4.2.3 Instantaneous values of imbalance analysis acc. Fortescue .......................... 10
4.2.4 Instantaneous values of extended power analysis.......................................... 10
4.2.5 Instantaneous values of optional fault current modules .................................. 11
4.3 Last recorded event ......................................................................................... 11
4.4 Minimum / maximum values of system quantities ........................................... 12
4.5 Minimum / maximum values of system analysis ............................................. 13
4.5.1 Maximum values of harmonic analysis (up to version 1.0x.80 7) .................... 13
4.5.2 Maximum values of harmonic analysis (from version 1.0x.875) ..................... 14
4.5.3 Maximum values of imbalance analysis acc. Fortescue ................................. 15
4.5.4 Maximum values of extended power analysis ................................................. 15
4.6 Mean values: Trend, Last values, minimum / maximum values ..................... 16
4.6.1 Mean values of power (standard quantities), averaging interval t1 ................. 16
4.6.2 User-defined mean values, averaging int erva l t2 ............................................ 16
4.6.3 Bimetal current, averaging interval t3 .............................................................. 16
4.7 Resetting of min/max values ........................................................................... 17
4.8 Present state of limit values ............................................................................ 17
4.9 Present state of monitor i ng f unc tions .............................................................. 17
4.10 Present state of digital inputs .......................................................................... 17
4.11 Summary alarm ............................................................................................... 18
5 Energy meters................................................................................................ 19
5.1 Meter contents of standard quantities ............................................................. 19
5.2 Meter contents of user-def ined qua ntit ies ....................................................... 19
5.3 Meter contents of digital inputs ........................................................................ 20
5.4 Present tariff of meters .................................................................................... 20
6 Operating h o u r counters .............................................................................. 21
7 Remote interface ........................................................................................... 22
Camille Bauer Metrawatt AG reserves the right to change the c ontent of this document at any time without notice.
Camille Bauer Metrawatt AG
Aargauerstrasse 7
CH-5610 Wohlen / Switzerland
Phone: +41 56 618 21 11
Telefax: + 41 56 618 35 35
E-Mail: info@cbmag.com
http://www.camillebauer.com
The basics of the MODBUS
communication are summarized in the document "Modbus
Basics. PDF" (see documentation CD or on our website http://www.camillebauer.com)
PM 1000168 000 07 Modbus interface SINEAX AMx000 2 / 22
1 Modbus communication
Addressing
Modbus groups different data types as references. For addressing the data one has to know that Modbus starts
the register numeration at 1, but the addressing at 0.
Example: Measurement U1N on register address 102
Address declaration in value table (see chapter 4.1): (4x)102
Real address: 102 (offset 1)
Address used in telegram transmission: 101 (offset 0)
Telegrams
Modbus/TCP
Modbus/RTU
• The information to transmit is the same for both Modbus/TCP and Modbus/RTU, displayed in green above.
• For Modbus/TCP device addressing is done by means of the IP address. The slave address (address field)
of the Modbus/RTU telegram is therefore no longer required, but I still present in the MBAP header and set
to 0xFF.
The network installation of the devices is done directly at the device or via web browser (see device
handbook). As soon as all devices have a unique network address they may be accessed by means of a
Modbus master client.
• The CRC check sum of the Modbus/RTU communication is dropped, because the security of the
transmission is assured on TCP communication level.
Reading bit information: Function 0x01, Read Coil Status
Bits are represented within a byte in a conventional way, MSB (Bit 7) on the most left and LSB (Bit 0) most right
(0101’1010 = 0x5A = 90).
Example: Read ing coi ls 100 u p to 111 of de v ice 17
Byte
Request
Answer
1
Slave address
0x11 resp. 0xFF
Slave address
0x11 resp. 0xFF
2
Function code
0x01
Function code
0x01
3 St art address
99 = Coil 100
0x00
Byte count
0x02
4 0x63
Byte 1
0x53
5 Num ber of regist ers:
100…111 => 12
0x00 Byte 2
0x03
6 0x0C
Checksum
crc_l
7
Checksum
crc_l CRC16 crc_h
8 CRC16 crc_h
for Modbus/RTU only
The start address of the request plus the bit position in the answer bytes corresponds to the coil address. Started bytes
are filled with zeros.
Hex Binary Coil 8 Coil 7 Coil 6 Coil 5 Coil 4 Coil 3 Coil 2 Coil 1
Byte 1 0x53 01010011b OFF ON OFF ON OFF OFF ON ON
Hex Binary - - - - Coil 12 Coil 11 Coil 10 Coil 9
Byte 2 0x03 00000011b - - - - OFF OFF ON ON