Hai, I am trying to communicate the conzerv EM3460 meter with delta PLC by RS485 network. i am getting response from the meter. pl anyone guide me how to decode it.
The register values are below.
eg: while reading the D1073 in 16bit format it shows "0". in 32 bit format it shows"1114112"<pre>
D1070 K1 K196609
D1071 K3 K2621443
D1072 K40 K40
D1073 K0 K1114112
D1074 K17 K8519697
D1075 K130 K9568386
D1076 K146 K146
D1077 K0 K1114112
D1078 K17 K1114129
D1079 K17 K5701649
D1080 K87 K87
D1081 K0 K196608
D1082 K3 K1441795
D1083 K22 K7405590
D1084 K0 K0
D1085 K0 K0</pre>
Sathya

 

A manual for the Conzerv EM3460 is at
http://tinyurl.com/ajjfxlv

Page 53 has whatever limited information is provided on their Modbus RTU implementation.

Their table lists only 7 variables available via Modbus, starting with

KW at 3003
PF at 3007
V at 3009
A at 3013
kWh at 3123
KVARh at 3125
MD at 3735

I wonder if its a truncated list, because there is mention of considerably more totalized/integrated data than appears on the register list.

Supported function codes are not listed but apparently 03 or 04 works, because you got replies.

There is no mention of data format.

I suspect that the totals kWh and KVARh are floating point values.

The irregular register spacing between the instantaneous values, 4 between KW and PF, 2 between PF and V, 4 between V and A leaves those formats open to speculation.

It isn't clear to me what you're reading at D1070 through D1085 (the D means?)

I'd try the 3xxx range and see how the returned data corresponds to values displayed and attempt to ascertain the data format that way.

A 32 bit format can be a long integer or a floating point real value.

 

Hi Sathya,

Were you able to solve the issue, Actually i'm facing the same issue and working on this for last 2-3 days, can you please help me if you got the solution.

Thanks, in advance.

Arvind