Reading iEM3355

[iridiu]

Hi Luca,
I have a very similar power meter (iEM3355) and I have difficulties in reading the registers. I have installed your software in a virtual environment with Python V3.5.3 and Pymodbus V2.0.0, but I'm receiving few errors.
It doesn't matter in which way I install Pymodbus or if Python version is 2.7 or 3.5.3, I receive this errors:

(ModBus) pi@HOOS-Computer:~/ModBus $ python main.py -m
2018-09-24 18:08:49,832 - utils - DEBUG - Log Management ModbusWrapperClient => utils
2018-09-24 18:08:49,847 - utils - DEBUG - Log Management SchneiderElectriciEM3255 => utils
2018-09-24 18:08:49,849 - utils - DEBUG - Log Management main => utils
2018-09-24 18:08:49,865 - utils - DEBUG - Read 47 modbus registers: ['Nominal Frequency => 2016,1,uint16', 'TotalActivePW => 3059,2,float32', 'L1Active => 3053,2,float32', 'Digital Output Association => 2130,1,uint16', 'Input Pulse Constant => 7051,2,float32', 'YYYY => 1844,1,uint16', 'PartialActiveEnergy => 3255,4,int64', 'Pulse Weight => 2131,2,float32', 'L1Current => 2999,2,float32', 'L3Active => 3057,2,float32', 'Digital Input Control Mode => 7273,1,uint16', 'L2Active => 3055,2,float32', 'FREQ => 3109,2,float32', 'Baud Rate => 6501,1,uint16', 'L3Current => 3003,2,float32', 'PartialReactiveEnergy => 3271,4,int64', 'Parity: => 6502,1,uint16', 'MS => 1847,1,raw', 'TotalActiveEnergy => 3203,4,int64', 'Hardware Revision => 135,5,utf8', 'TotalApparentPW => 3075,2,float32', 'Input Label => 7031,20,utf8', 'TotalReactivePW => 3067,2,float32', 'Serial Number => 129,2,uint32', 'L1Voltage => 3027,2,float32', 'Meter Name => 29,20,utf8', 'L2Current => 3001,2,float32', 'Date of Manufacture => 131,4,datetime', 'Power System => 2015,1,uint16', 'L2Voltage => 3029,2,float32', 'Number of Phases => 2013,1,uint16', 'Firmware Version => 1636,1,uint16', 'Address => 6500,1,uint16', 'TotalPowerFactor => 3083,2,float32', 'Manufacturer => 69,20,utf8', 'Input Digital Input Association => 7054,1,uint16', 'Number of Wires => 2014,1,uint16', 'MM-WW-GG => 1845,1,raw', 'Meter Model => 49,20,utf8', 'Protocol => 6499,1,uint16', 'Digital Input Status => 8904,2,bitmap', 'Meter Operation Timer => 2003,2,uint32', 'L3Voltage => 3031,2,float32', 'TotalReactiveEnergy => 3219,4,int64', 'Energy Pulse Duration => 2128,1,uint16', 'Digital Output Control Mode Status => 9672,1,uint16', 'HH-MM => 1846,1,raw', ]
2018-09-24 18:08:49,866 - utils - DEBUG - modbusmap: {'Nominal Frequency': [2016, 1, 'uint16'], 'TotalActivePW': [3059, 2, 'float32'], 'L1Active': [3053, 2, 'float32'], 'Digital Output Association': [2130, 1, 'uint16'], 'Input Pulse Constant': [7051, 2, 'float32'], 'YYYY': [1844, 1, 'uint16'], 'PartialActiveEnergy': [3255, 4, 'int64'], 'Pulse Weight': [2131, 2, 'float32'], 'L1Current': [2999, 2, 'float32'], 'L3Active': [3057, 2, 'float32'], 'Digital Input Control Mode': [7273, 1, 'uint16'], 'L2Active': [3055, 2, 'float32'], 'FREQ': [3109, 2, 'float32'], 'Baud Rate': [6501, 1, 'uint16'], 'L3Current': [3003, 2, 'float32'], 'PartialReactiveEnergy': [3271, 4, 'int64'], 'Parity:': [6502, 1, 'uint16'], 'MS': [1847, 1, 'raw'], 'TotalActiveEnergy': [3203, 4, 'int64'], 'Hardware Revision': [135, 5, 'utf8'], 'TotalApparentPW': [3075, 2, 'float32'], 'Input Label': [7031, 20, 'utf8'], 'TotalReactivePW': [3067, 2, 'float32'], 'Serial Number': [129, 2, 'uint32'], 'L1Voltage': [3027, 2, 'float32'], 'Meter Name': [29, 20, 'utf8'], 'L2Current': [3001, 2, 'float32'], 'Date of Manufacture': [131, 4, 'datetime'], 'Power System': [2015, 1, 'uint16'], 'L2Voltage': [3029, 2, 'float32'], 'Number of Phases': [2013, 1, 'uint16'], 'Firmware Version': [1636, 1, 'uint16'], 'Address': [6500, 1, 'uint16'], 'TotalPowerFactor': [3083, 2, 'float32'], 'Manufacturer': [69, 20, 'utf8'], 'Input Digital Input Association': [7054, 1, 'uint16'], 'Number of Wires': [2014, 1, 'uint16'], 'MM-WW-GG': [1845, 1, 'raw'], 'Meter Model': [49, 20, 'utf8'], 'Protocol': [6499, 1, 'uint16'], 'Digital Input Status': [8904, 2, 'bitmap'], 'Meter Operation Timer': [2003, 2, 'uint32'], 'L3Voltage': [3031, 2, 'float32'], 'TotalReactiveEnergy': [3219, 4, 'int64'], 'Energy Pulse Duration': [2128, 1, 'uint16'], 'Digital Output Control Mode Status': [9672, 1, 'uint16'], 'HH-MM': [1846, 1, 'raw']}
2018-09-24 18:08:49,871 - utils - DEBUG - valid_addresses: [29, 30, 32, 35, 39, 44, 49, 50, 52, 55, 57, 59, 64, 65, 69, 70, 72, 74, 75, 77, 79, 84, 85, 90, 94, 95, 97, 104, 105, 107, 114, 115, 120, 124, 127, 129, 130, 131, 132, 134, 135, 136, 137, 138, 140, 141, 145, 147, 149, 150, 154, 160, 165, 169, 174, 182, 185, 189, 200, 202, 205, 219, 220, 222, 239, 240, 259, 279, 1636, 1637, 1844, 1845, 1846, 1847, 1848, 2003, 2004, 2006, 2013, 2014, 2015, 2016, 2017, 2128, 2129, 2130, 2131, 2132, 2134, 2999, 3000, 3001, 3002, 3003, 3004, 3006, 3027, 3028, 3029, 3030, 3031, 3032, 3034, 3053, 3054, 3055, 3056, 3057, 3058, 3059, 3060, 3062, 3067, 3068, 3070, 3075, 3076, 3078, 3083, 3084, 3086, 3109, 3110, 3112, 3203, 3204, 3206, 3209, 3213, 3219, 3220, 3222, 3225, 3229, 3255, 3256, 3258, 3261, 3265, 3271, 3272, 3274, 3277, 3281, 6499, 6500, 6501, 6502, 6503, 7031, 7032, 7034, 7037, 7041, 7046, 7051, 7052, 7054, 7055, 7059, 7067, 7076, 7086, 7097, 7109, 7122, 7136, 7151, 7167, 7184, 7202, 7221, 7241, 7273, 7274, 8904, 8905, 8907, 9672, 9673]
2018-09-24 18:08:49,872 - utils - DEBUG - load_valid_addresses
Connesso? True

SETTINGS
2018-09-24 18:08:49,873 - utils - DEBUG - cachedRead param (startreg=29, counter=20, mb_type=utf8, mb_funcall=3)
2018-09-24 18:08:49,874 - utils - DEBUG - bufferedReadRegisters param (startreg=29, counter=20, mb_type=utf8, mb_funcall=3)
2018-09-24 18:08:49,877 - utils - ERROR - 'ExceptionResponse' object has no attribute 'registers'
Traceback (most recent call last):
File "/home/pi/ModBus/ModbusWrapperClient.py", line 87, in readRegisters
tmp = result.registers
AttributeError: 'ExceptionResponse' object has no attribute 'registers'
2018-09-24 18:08:49,880 - utils - DEBUG - BUFFER empty ---
2018-09-24 18:08:49,880 - utils - DEBUG - bufferedReadRegisters param (startreg=29, counter=20, mb_type=utf8, mb_funcall=3)
2018-09-24 18:08:49,883 - utils - ERROR - 'ExceptionResponse' object has no attribute 'registers'
Traceback (most recent call last):
File "/home/pi/ModBus/ModbusWrapperClient.py", line 87, in readRegisters
tmp = result.registers
AttributeError: 'ExceptionResponse' object has no attribute 'registers'
2018-09-24 18:08:49,884 - utils - DEBUG - BUFFER empty ---
Traceback (most recent call last):
File "main.py", line 56, in
main()
File "main.py", line 25, in main
value = pm._modbusRead(i)
File "/home/pi/ModBus/SchneiderElectric_iEM3255.py", line 91, in _modbusRead
val = self.mb.cachedRead(self.modbusmap[key][0], self.modbusmap[key][1], self.modbusmap[key][2])
File "/home/pi/ModBus/ModbusWrapperClient.py", line 315, in cachedRead
regs.append(self.data_buffer[startreg - self.bufferStart + i])
TypeError: 'NoneType' object is not subscriptable

[lucab85]

Hi @iridiu ,
iEM3355 is a sibling of iEM3255 with a similar/same registry structure.
My project works with Python 2.7.
Pymodbus, the base of my work, is very powerful but not very verbose about error management.
I think you need to investigate deeply about the communication process.
You can also try to use minicom on the serial line (please note that this lock down the serial port).

[M-VdM]

Hi Luca,

Same python errors here ...
(I'm using a PM3250, but it has the same register-set)

BTW: Is this code able to talk to a serial modbus device (via e.g. /dev/ttyUSB0) ?

Kind Regards,
M_VdM.