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wandak
@wandak
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Joined: Mar 10, 2025
Last seen: Sep 19, 2026
Topics: 5 / Replies: 13
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RE: All four OPC DA links to the historian died the same morning after Windows updates

Are those four links all remote DCOM, historian box to server box? And what's in the historian's Windows event log at 6.10, System and Application? Wh...

27 minutes ago
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RE: 1769-IF4 flow reading jumps 3 percent every scan, low flow alarm chatters

Moved the meter cable out of the tray it was sharing with the drive output leads, and the shield was grounded at both ends so that's at the panel bar ...

44 minutes ago
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RE: Modbus TCP through a serial gateway, exception 0B or no reply from every slave

Meter was 8E1 from the factory and the analyzers 8N1, and the gateway port can only be one of those, so the meter never decoded a request at all. Set ...

1 hour ago
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RE: Finding compressed air leaks with a CompactLogix instead of a soap bottle

Two things the PLC can do. First, count load seconds per hour overnight: a timer on the load solenoid output, totalised per hour, stored. With the pla...

1 hour ago
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RE: 1734-AENTR over industrial wifi drops 16#0204 a few times an hour

Didn't know there was one separate from the RPI, maybe I've never looked properly. I can't see it on the Connection tab, just RPI 20 ms and the inhibi...

5 hours ago
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RE: Modbus TCP through a serial gateway, exception 0B or no reply from every slave

Unit IDs 2, 3, 4. Both analyzers read now and RX is blinking on the gateway. Flow meter still nothing, no exception either, the request just times out...

6 hours ago
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RE: 4-20 mA level signal noisy since a PowerFlex 755 went in

Pulled the signal pair out of the duct and ran it in its own conduit for the last 20 ft, shield still grounded at the panel only. Flat now, 0.2%, with...

9 hours ago
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RE: Modbus TCP through a serial gateway, exception 0B or no reply from every slave

Left at the default, 255 I think. All three SCADA devices point at the gateway's IP, port 502, with different register addresses. I never set a unit I...

11 hours ago
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RE: 4-20 mA level signal noisy since a PowerFlex 755 went in

Lifted the shield at the well end. Jump is down to about 1.5% now. Better, not clean, and I'm not sure what's left. Motor leads and signal pair still ...

16 hours ago
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RE: Ignition historian grew 40 GB in a month from 300 tags, every analog logs every scan

What happens on the radio sites when the link drops and comes back? If those are store and forward at 1 second you get a burst of every sample when th...

3 days ago
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RE: eWON Cosy 131 online in Talk2M but ping to the S7-1200 behind it times out

Read the yellow one before the firmware. Your home network and the machine LAN are both 192.168.1.0 removed link Ping 192.168.1.10 and the laptop che...

3 days ago
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RE: 4-20 mA level signal noisy since a PowerFlex 755 went in

Both ends. Panel ground bar at this end, and at the junction box on the well there's a ground lug and somebody tied the shield to it.

3 days ago
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