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Logging Hobut M850 power meter data with Dt80 via RS485

Hello, I am trying to log the voltage current and power data from the m850 power meter via rs485 with a dt80 logger. I found some code examples and put the following code together. I have linked the manual with the modbus register list. Can any one say if this should work? Any Help most welcome

https://www.hobut.co.uk/wp-content/uploads/2022/02/M850-LTHN-RS-PO-User-manual-rev-4-SP-compressed-10-10-14.pdf

Begin’M850PM’
‘=================================================

‘ DT80 code to read a Hobut M850 power meter
‘ via RS485 Modbus

‘ 1 Phase 2 wire configuration.
‘ Reads all Modbus type 3 registers.

‘ This code used block reads of Modbus registers
‘ - Block reads are in groups of 10 for readability
‘ - Block reading reduces reading times of registers
‘ -Channel Variables
‘ ----- 4CV = Voltage
‘ ----- 7CV = Current
‘ ----- 10CV = Watts
‘=================================================
‘ Profile settings for Modbus Master
‘ Note: Check port settings and set profile to match.
Profile SerSen_Port Mode=RS485
Profile SerSen_Port Function=Modbus_Master
Profile SerSen_Port BPS=9600
Profile SerSen_Port Data_Bits=8
Profile SerSen_Port Stop_Bits=1
Profile SerSen_Port Parity=None
Profile SerSen_Port Flow=None
RA”PwrMtr”(“B:”,Data:Ov:7D)1M

‘Block read registers 1 to 10 and save to channel variable 1 to 10.

1Modbus(Ad1,R3:1,MBF,MES,TO1,RT2,=1..10CV,W)
1CV(“Not Used~V”,FF6)
2CV(“Not Used~V”,FF6)
3CV(“Not Used~V”,FF6)
4CV(“Voltage Phase 1~V”,FF6)
5CV(“Not Used~A”,FF6)
6CV(“Not Used~A”,FF6)
7CV(“Current Phase 1~A”,FF6)
8CV(“Not Used”,FF6)
9CV(“Not Used~W”,FF6)
10CV(“Watts Phase 1~W”,FF6)

End

Hello, I am trying to log the voltage current and power data from the m850 power meter via rs485 with a dt80 logger. I found some code examples and put the following code together. I have linked the manual with the modbus register list. Can any one say if this should work? Any Help most welcome https://www.hobut.co.uk/wp-content/uploads/2022/02/M850-LTHN-RS-PO-User-manual-rev-4-SP-compressed-10-10-14.pdf Begin’M850PM’ ‘================================================= ‘ ‘ DT80 code to read a Hobut M850 power meter ‘ via RS485 Modbus ‘ ‘ 1 Phase 2 wire configuration. ‘ Reads all Modbus type 3 registers. ‘ ‘ This code used block reads of Modbus registers ‘ - Block reads are in groups of 10 for readability ‘ - Block reading reduces reading times of registers ‘ -Channel Variables ‘ ----- 4CV = Voltage ‘ ----- 7CV = Current ‘ ----- 10CV = Watts ‘================================================= ‘ Profile settings for Modbus Master ‘ Note: Check port settings and set profile to match. Profile SerSen_Port Mode=RS485 Profile SerSen_Port Function=Modbus_Master Profile SerSen_Port BPS=9600 Profile SerSen_Port Data_Bits=8 Profile SerSen_Port Stop_Bits=1 Profile SerSen_Port Parity=None Profile SerSen_Port Flow=None RA”PwrMtr”(“B:”,Data:Ov:7D)1M ‘Block read registers 1 to 10 and save to channel variable 1 to 10. 1Modbus(Ad1,R3:1,MBF,MES,TO1,RT2,=1..10CV,W) 1CV(“Not Used~V”,FF6) 2CV(“Not Used~V”,FF6) 3CV(“Not Used~V”,FF6) 4CV(“Voltage Phase 1~V”,FF6) 5CV(“Not Used~A”,FF6) 6CV(“Not Used~A”,FF6) 7CV(“Current Phase 1~A”,FF6) 8CV(“Not Used”,FF6) 9CV(“Not Used~W”,FF6) 10CV(“Watts Phase 1~W”,FF6) End

Hi CraigMali,

The program is correct, if you look at page 48 in the "register" column the address starts from 0 (not 30000), and you can use the 3X column to locate the "register address" for dataTaker.

From table V1, I1 and kW are the fourth, seventh, and tenth values. The critical component in your integration work is port setting matching between the logger and the sensor. Also, the wiring arrangement. You may need to do a bit of trial and error to get it right.

Best regards,
dataTaker Expert

Hi CraigMali, The program is correct, if you look at page 48 in the "register" column the address starts from 0 (not 30000), and you can use the 3X column to locate the "register address" for dataTaker. From table V1, I1 and kW are the fourth, seventh, and tenth values. The critical component in your integration work is port setting matching between the logger and the sensor. Also, the wiring arrangement. You may need to do a bit of trial and error to get it right. Best regards, dataTaker Expert
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