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rsdave
@rsdave
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Joined: Dec 2, 2024
Last seen: Sep 22, 2026
Topics: 1 / Replies: 64
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RE: Told to back up every PLC on site, three brands of rack and no list anywhere

That sheet will outlast all of us. Keep it in the panel too.

2 weeks ago
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RE: Told to back up every PLC on site, three brands of rack and no list anywhere

The label tells you nearly everything, you just have to read the right part of it. What's the catalogue number on the leftmost module in each rack, th...

2 weeks ago
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RE: CIP Generic MSG to a PowerFlex 525 comes back 16#0005 every time

Then it isn't the path. On a Data Table Read 0005 usually is, but a CIP Generic errors the path as 0001 with an extended code in a different member, s...

2 weeks ago
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RE: Parts per minute goes to a huge number at power-up, divide by zero on an S7-1500

Zero is a measurement and you haven't got one, so don't print one. Hold the last good rate in its own tag and write that when the divisor is no good. ...

2 weeks ago
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RE: Laying tags out on a 1756-L83E now so a per station shift report is possible later

Good. Resize is the easy half, the name string is what saves you.

2 weeks ago
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RE: Parts per minute goes to a huge number at power-up, divide by zero on an S7-1500

Guard the divisor, not the output. One compare in front of it, elapsed greater than zero, and only then do the divide. Everything else is a plaster ov...

2 weeks ago
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RE: Laying tags out on a 1756-L83E now so a per station shift report is possible later

Index works right up until somebody adds station seven in the middle or pulls four out for a rebuild, and then every report older than that day is rea...

2 weeks ago
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RE: Laying tags out on a 1756-L83E now so a per station shift report is possible later

How does the report actually get at the data. Is something browsing tags by name, or is it a query against a historian that is already logging them?

2 weeks ago
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RE: Excel sheet off a CompactLogix stopped updating, RSLinx topic still shows good

There it is. Calculation mode is not a property of the workbook you are looking at, it belongs to the Excel instance, and the instance takes it from w...

2 weeks ago
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RE: CompactLogix 1769 bank, slot 4 faults 16#0114 after a download, rest of the rack fine

Open Module Properties on slot 4, Connection tab, and give us the fault text and the code that comes with it, all of it, not just the number. If I rem...

3 weeks ago
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RE: CIP Generic MSG to a PowerFlex 525 comes back 16#0005 every time

Firmware on the 525, and what version of Studio 5000 are you on? And paste the four boxes off the Configuration tab exactly as they sit on the screen...

3 weeks ago
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RE: 1756-L71 bottle count is exactly double on one line, ONS and ADD, sensor is clean

Three years of dividing by two. Startup_Old was somebody's test rig, I'd bet.

3 weeks ago
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RE: PanelView Plus 6 clock 11 minutes off, alarm timestamps disagree with the PLC

Same chain on most of ours. The GSV rung is the part people forget to add.

3 weeks ago
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RE: Replacement 1734-OB8S never connects, SNN mismatch, safety task inoperable

Good that it went in the book. That's the part the last swap missed.

3 weeks ago
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RE: ControlLogix T04:C34 timer preset negative after operator loads a recipe

Learned that one the same way, on a filler. Not fun. That offset field has bitten more than one of us.

3 weeks ago
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