Modbus Comms Dropouts

[DCIM_Support]

Hello.

We are using DCE 7.4.3 & we connect to many modbus devices mainly Power Meters in our Switchboards.  We have a particular Schneider PM850 Power Meter & its comms drops to DCE for up to 2 hours regularly.  I can however open its webpage within DCE & I can ping the device from DCE.  I have tried many device scans but the device will not return to be viewable to DCE.  Usually a few hours later it becomes visible again.  I have compared it to another PM850 power meter residing within the same floor & connected to the same switch & I cant see any differences in any internal settings.

 Any ideas?

(CID:126181412)

[DCIM_Support]

Dear Jeff Harrold

Have you solved your issue or not?

I have tried many device scans but the device will not return to be viewable to DCE.

You mean, that the Modbus device loses connection (comm lost alert) with the DCE-server?

With respect.

(CID:126183348)

[DCIM_Support]

Yes that is correct.  ISX loses connectivity to a particular modbus device for a period of time, usually up to 2 hours & then it returns.  There seems to be no manual intervention causing the issue & it always returns to service.  It is not always the same device either.

(CID:126183765)

[DCIM_Support]

Dear Jeff Harrold,

Ok, I understand you. And how are your power meters connected to DCE-server? If through separate TCP/IP Modbus gateways, is it possible to look, for example, connection statistics (number of transmitted/received packets, number of CRC errors, number of timeouts, etc.)? That is, as it can be seen through the web-GUI TCP/IP Modbus gateway Ethernet Gateway Link150 (new gateway) or ConneXium Ethernet Gateway TSXETG100 (old gateway).

With respect.

(CID:126183995)

[DCIM_Support]

Sorry for the delay.

We have a major switchboard power switch that is being replaced so I am waiting for that to happen, in the hope it may be causing our comms issues.

When that happens, i'll get back to you

(CID:126885714)

[DCIM_Support]

Ok, in any case, thanks for the feedback 😀.

(CID:126885757)

[DCIM_Support]

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