7.1.2 Signal reset Used to reset the device alarm signal.
The system issues commands: EB 90 EB 90 02 device address number 5F 01 01 04 code and (L) code and (H) 03.
7.1.3 Status inquiry system delivers the command: EB 90 EB 90 02 Device address number 50 01 01 04 Code and (L)
Code and (H) 03. The action time data format is BCD code. Bus number: 01-I, 02-II, 03-III, 04-IV.
Frequency: 011 - three frequency division; 012 - two frequency division; 013 - power frequency; 014 - frequency tripled. Type: 021—Resonance; 022—Overvoltage; 023—Single-phase grounding harmonic eliminator.
7.2 CDT Protocol When the device's communication protocol is CDT, the device does not receive any information, and the device uploads data regularly. The format of the message is as follows:
EB 90 EB 90 EB 90 71 F4 01 Device address 01 CRC F0 Bus number 00 Type 00 CRC
The device has no action: the bus number and type are 00. Device Action: Bus No. 01-I, 02-II, 04-III, 08-IV; Type: 01—Resonance, 02—Overvoltage, 04—Single-Phase Ground.
Source: Free B2B Website http://
7.3 MODBUS Specification A Harmonic Resonator Message Format is as follows: Device Address Function Code Data Quantity Data 1 ... Data n CRC(L) CRC(H)
7.3.1 The system sends a command to the network: a harmonic elimination device address 5A 06 year, month, day, hour, minute and second CRC(L) CRC(H) Note: The time data format is BCD code. 7.3.2 Signal Retransmission Command issued by the system: Device address 5F 04 00 00 00 1E CRC(L) CRC(H)
7.3.3 State query system delivers commands: Device address 50 04 00 00 00 A5 CRC(L) CRC(H)
A harmonic eliminator: Device address 55 04 Bus number 00 Type 00 CRC(L) CRC(H)
Microcomputer harmonic elimination device no action: bus number, type 00. Device Action: Bus No.: 01-I, 02-II, 04-III, 08-IV; Type: 01—Resonance, 02—Overvoltage, 04—Single-Phase Ground.