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edj
@edj
New Member
Joined: Jan 15, 2025
Last seen: Sep 19, 2026
Topics: 7 / Replies: 18
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RE: Star-delta, soft starter or VFD for a 45 kW compressor

Pressure switch and the unload solenoid, that's the whole controller. There's nothing on it that could take a speed reference, and the compressor vend...

12 hours ago
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RE: Plant kWh total in a CompactLogix went to minus 2 billion after 24 days

DINT, says so in the tag list. Historian has 2,147,480,112 at 05:58 and then -2,147,428,851 at 05:59. The meter's own kWh reads 2,148,900 since it was...

12 hours ago
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RE: DeviceNet 1756-DNB error 91 bus-off a few hours after conduit rework

Meter it before you guess. Network power off, ohms between CAN_H and CAN_L at the scanner tap.

3 days ago
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RE: 1734-IB8S door switch input short to test output every time the door closes

Three terminals for four wires. Which two share? Take the switch off the strip and put your meter across the two panel wires at the JB, ohms. If you ...

3 days ago
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RE: Finding compressed air leaks with a CompactLogix instead of a soap bottle

A bigger receiver just changes how often it loads. Same air leaks out of the same holes. What's the receiver size and the pressure band, load and unlo...

3 days ago
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RE: CompactLogix reboots whenever a bank of solenoids fires

What feeds the 24V, how many supplies and what rating? And what does the voltage do while the valves fire, not at idle. Idle tells you nothing.

4 days ago
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RE: 2-wire prox keeps an S7-1200 input on with nothing in front of it

Two numbers. What's the sensor's off-state leakage on its datasheet, and what does the CPU spec say for a guaranteed 0 on that input, voltage and curr...

4 days ago
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