Elecnova DDS1946-1P DIN-Rail Mounted Energy Meter Instruction Manual
Modbus-RTU communication
Modbus-RTU communication protocol message format
Read data register value（function code 0x03/0x04）
|
Host request |
Frame structure | address code | function code | data code | CRC check code | |
| initial registeraddress | number ofregister | |||||
| Byte | 1 byte | 1 byte | 2 bytes | 2 bytes | 2 bytes | |
| datarange | 1～247 | 0x03/0x04 | max 100 | CRC16 | ||
| messageexample | 0x01 | 0x03 | 0x00 0x00 | 0x00 0x06 | 0xC5 0xC8 | |
|
Slave response |
frame structure | address code | function code | data code | CRC check code | |
| byte of register | register value | |||||
| byte | 1 byte | 1 byte | 1 byte | 12 bytes | 2 bytes | |
| messageexample | 0x01 | 0x03 | 0x0C | 12-byte data | CRC16 | |
Remark: the initial register address in host inquiry is the initial address of the data collected from power grid. The number of register indicates the length of the data. In the upper list the register address “0x00 0x00” indicates the initial address of phase voltage float data of three phases, and the number of register “0x00 0x06” indicates the length of the data is 6 (three float data occupies six registers). Please refer to appendix 1 MODBUS-RTU communication address information table.
Write setting register value（function code 0x10）
| example | 0x02 | 0x00 | ||||||
|
slave response |
frame structure |
address code |
function code |
data code | CRCcheck code | |||
| initialrelay address |
relay length |
|||||||
| byte | 1 byte | 1 byte | 2 bytes | 2 bytes | 2 bytes | |||
| message example | 0x01 | 0x10 | 0x080x02 | 0x00 0x01 | 0xA269 | |||
Remark: Please strictly follow the Meter setting information address list in appendix when writing setting register. Do not change the reserved data. Written data should not exceed set range. Wrong operation may cause meter damaged.
Appendix 1 MODBUS-RTU communication address information list 0x03/0x04 command data register address:
| Address | Format | Data description | Unit | R/W | ||||||||||||
| float type data | ||||||||||||||||
| 0000-0001 | float | Voltage | V | R | ||||||||||||
| 0002-0003 | float | Current | A | R | ||||||||||||
| 0004-0005 | float | Active power | kW | R | ||||||||||||
| 0006-0007 | float | Reactive power | kvar | R | ||||||||||||
| 0008-0009 | float | Apparent power | kVA | R | ||||||||||||
| 000A-000B | float | Power factor | R | |||||||||||||
| 000C-000D | Float | Frequency | 1Hz | |||||||||||||
| 000E-000F | float | Import active energy | kWh | R | ||||||||||||
| 0010-0011 | float | Export active energy | kWh | R | ||||||||||||
| 0012-0013 | float | import reactive energy | kvarh | R | ||||||||||||
| 0014-0015 | float | export reactive energy | kvarh | R | ||||||||||||
| 0016-00FF | — | |||||||||||||||
| Time data | ||||||||||||||||
| 0100 | Char | Time | year-month | R | ||||||||||||
| 0101 | Char | Time | day-hour | R | ||||||||||||
| 0102 | Char | Time | minute-secon d |
R | ||||||||||||
| 0103 | Char | Time | week-reserved | R | ||||||||||||
| 0104-0105 | — | |||||||||||||||
| Energy data | ||||||||||||||||
| 0106-0107 | Long | Import active energy | 10Wh | R | ||||||||||||
| 0108-0109 | Long | Export reactive energy | 10Wh | R | ||||||||||||
| 010A-010B | Long | import reactive energy | 10varh | R | ||||||||||||
| 010C-010D | Long | export reactive energy | 10varh | R | ||||||||||||
| 010C-0117 | Reserved | |||||||||||||||
| 0118-0119 | Long | Active energy [total] | 10Wh | R | ||||||||||||
| 011A-011B | Long | Active energy [P1] | 10Wh | R | ||||||||||||
| 011C-011D | Long | Active energy [P2] | 10Wh | R | ||||||||||||
| 011E-011F | Long | Active energy [P3] | 10Wh | R | ||||||||||||
| 0120-0121 | Long | Active energy [P4] | 10Wh | R | ||||||||||||
| 0122-012B | Long | Active energy of present month [total, P1,P2, P3, P4] | 10Wh | R | ||||||||||||
| 012C-0135 | Long | Active energy of last month [total, P1, P2,P3, P4] | 10Wh | R | ||||||||||||
| 0136-013F | Long | Active energy of previous 3rd month frompresent month [total, P1, P2, P3, P4] | 10Wh | R | ||||||||||||
| 0140-0149 | Long | Active energy of previous 4th month frompresent month [total, P1, P2, P3, P4] | 10Wh | R | ||||||||||||
| 014A-0153 | Long | Active energy of previous 5th month frompresent month [total, P1, P2, P3, P4] | 10Wh | R | ||||||||||||
| 0154-015D | Long | Active energy of previous 6th month frompresent month [total, P1, P2, P3, P4] | 10Wh | R | ||||||||||||
| 015E-0167 | Long | Active energy of previous 7th month frompresent month [total, P1, P2, P3, P4] | 10Wh | R | ||||||||||||
| 0168-0171 | Long | Active energy of previous 8th month from | 10Wh | R | ||||||||||||
| present month [total, P1, P2, P3, P4] | ||||||||||||||||
| 0172-017B | Long | Active energy of previous 9th month frompresent month [total, P1, P2, P3, P4] | 10Wh | R | ||||||||||||
| 017C-0185 | Long | Active energy of previous 10th monthfrom present month [total, P1, P2, P3, P4] | 10Wh | R | ||||||||||||
| 0186-018F | Long | Active energy of previous 11th monthfrom present month [total, P1, P2, P3, P4] | 10Wh | R | ||||||||||||
| 0190-0199 | Long | Active energy of previous 12th monthfrom present month [total, P1, P2, P3, P4] | 10Wh | R | ||||||||||||
| 019A-01FF | — | |||||||||||||||
| Electrical parameter data | ||||||||||||||||
| 0200 | Int | Voltage | 0.1V | R | ||||||||||||
| 0201 | Int | Current | 0.01A | R | ||||||||||||
| 0202 | Int | Active power | 10W | R | ||||||||||||
| 0203 | Int | Reactive power | 10var | R | ||||||||||||
| 0204 | Int | Apparent power | 10VA | R | ||||||||||||
| 0205 | Int | Power factor | 0.001 | R | ||||||||||||
| 0206 | Int | Frequency | 0.01Hz | R | ||||||||||||
| 0207-00FF | — | |||||||||||||||
| Demand and extreme value | ||||||||||||||||
| 0600 | Int | Max. voltage value | 0.1V | R | ||||||||||||
| 0601 | Reserved | |||||||||||||||
| 0602 | Int | Historical max. current value | 0.01A | R | ||||||||||||
| 0603 | Int | Historical max. active power value | 10W | R | ||||||||||||
| 0604 | Int | Historical max. reactive power value | 10var | R | ||||||||||||
| 0605 | Int | Historical max. apparent power value | 10VA | R | ||||||||||||
| 0606 | Int | Historical min. voltage value | ||||||||||||||
| 0607 | Reserved | |||||||||||||||
| 0608 | Int | Historical min. current value | 0.01A | R | ||||||||||||
| 0609 | Int | Historical min. active power value | 10W | R | ||||||||||||
| 060A | Int | Historical min. reactive power value | 10var | R | ||||||||||||
System setting parameter
| Address | Format | Data description | Unit | R/W | ||||||
| System setting | ||||||||||
| 0800-0804 | — | |||||||||
| 0804 | Int | High byte: #1 communication | 1-247 | R/W | ||||||
| address | ||||||||||
| Low byte: #1 baud rate | 0：1200bps | |||||||||
| 1：2400bps | ||||||||||
| 2：4800bps | ||||||||||
| 3：9600bps | ||||||||||
| 0805 | Int | High byte: #1 check mode | 0：N,8,1 1：E,8,12：O,8,1 3：N,8,2 | R/W | ||||||
| 0806-081f | Reserved | |||||||||
| 0820 | Int | Demand item | Defaulted as three phase circuit, active power, reactivepower and apparent power | R | ||||||
| 0821 | Int | #1 demand work mode | 0： slip mode1： fixed mode | R/W | ||||||
| 0822 | Int | #1 slip time（t） | 1～9999s | R/W | ||||||
| 0823 | Int | #1 calculation period（T） | 1～30t | R/W | ||||||
| 0824-082F | Char | Time zones in first set of tariffs | Hour and minute of twelvetime zones. No.1 time zone starts from 00:00. | R/W | ||||||
| 0830-083B | Char | Times zones in second set of tariffs | Hour and minute of twelve time zones. No.1 time zonestarts from 00:00. | R/W | ||||||
| 083C-0841 | Char | Rates of first set of tariffs | Rates correspond to time zones in first set of tariffs:0-P1, 1-P2, 2-P3, 3-P4 | R/W | ||||||
| 0842-0847 | Char | Rates of second set of tariffs | Rates correspond to time zones in second set of tariffs:0-P1, 1-P2, 2-P3, 3-P4 | R/W | ||||||
| 0848-084D | Char | Select one set of tariffs for a month | 0：first set of tariffs 1：secondset of tariffs | R/W | ||||||
| 084E | Char | Meter reading time | Automatic meter reading: day, hour | R/W | ||||||
| 084F-08FF | — | |||||||||
The information in this document is subject to changes without any further notice.
JIANGSU SFERE ELECTRIC CO., LTD.
Add: 1 Dongding R., Jiangyin, Jiangsu, China.
P.C: 214437
Tel: +86-510-86199063
Email: [email protected]
Website: www.elecnova-energy.com.vn
