ComX510 and BMS reading meters

[Mark_Raftery]

Hi,

I have been looking at some threads here and would like to see if anyone has some ideas.

A normal install for us is, PM5111 or iEM3255 on a modbus network connected to a ComX510 with GRPS sending data to EDV or RA PAM.

We have a couple of enquiries where a BMS wants to see meter data as well.

I do not want the meters to be connected to the BMS and then the BMS send data to us. What I want is to allow the BMS to connect to the ComX and get the meter data separately or from a modbus table in the ComX.

I have seen a thread talking about using an EGX150 or Link150 and setting up the meters as IP addresses. This sounds very simple if two masters can conect tot this device and separate gather data. Is this the best solution or could the BMS connect to the Ethernet port on the ComX and read meter data that way.

Has anyone had any experience doing this, before I buy a Link150 and try? Or thoughts on another souloution or thread on here that I may have missed

Regards from Mark

[Adria_Casas]

Hi Mark,

the Com'X can do both at the same time: act as a datalogger to publish data to RA/PAM (or other cloud based system) and as a Modbus RTU/TCP gateway, so you can read "downstream" devices from another system (BMS in your case).

By default, this Modbus Gateway functionality is disabled, so In order to do achieve that, you might need to configure some settings under the Communications, Security AND Firewall settings pages.

After that, you should be able to read any Modbus RTU device connected to the COM'X as you would do with any other Modbus Gateway (EGX100, Link150, etc), and even the digital and analog outputs using the modbus tables in the Com'x manual.

A Modbus TCP/IP gateway should be able to handle several masters, and if there's any limitation to the number of connections it would probably be due to the Serial bus bandwidth

Hope this helps

[greg_expoenergy]

Hi Mark,

To add to what has been noted above by Adria.

As I understand matters you normally use the COM'X to connect to these meters and send data via GPRS.

One presumes that you do this via Modbus serial using the RS 485 port on of the COM'X.

If this is so then all you have to do is to connect the BMS to the COM'X Ethernet port and access the meters via the IP and slave address.

Thus the meters will be accesses by EDV or RA PAM via Ethernet via 3G and by the BMS via the COM'X Ethernet port and this should work fine. No need for any EGX150.

CURRENT

EDV / R PAM  -----   3G ------- COM'X ---------- RS 485 ------------ Meter Slave 1 ------- Meter Slave n

PROPOSED

EDV / R PAM --- 3G --------------------

                                                         |  --- COM'X ---- RS 485 --------------- Meter Slave 1 ------- Meter Slave n

BMS ------------> Ethernet Port 1 -----

This is shown below.