Last seen: Sep 19, 2026
Was the valve proved before you blamed the software? Stroke it 0 to 100 from the HMI in manual and watch the position feedback follow. A positioner wi...
Prove the meter first. Every time.
Both, then. Tilt the eye as carl says and keep the timer, because any eye will give you a short edge sooner or later. Final rung: I:0/3 into a TON, T...
A soft starter does not switch at 4 kHz. Pull the filter.
Yes. Put a scope on that wire, or a fast meter, and you'll see 24V with a short drop every so often. That's the IB8S pulling T0 low for a moment and c...
Before the software, one check: with the heater forced on from a watch table, does the Pt100 climb? If yes the loop is proved and it is only the block...
Trend the PV on its own for a minute at 100 ms, nothing else changing. How much does it move when the process is sitting still? And the transmitter, 4...
400 ft is nothing for RS485, a kilometre works at 19200. Before you buy a repeater: with the master idle, what DC voltage do you read A to B at meter ...
No. A CTU counts the rising edge of its rung, one per false to true, however many scans the rung then stays true. So the eye's giving you more than on...
Before the block, prove the meter. With a laptop Modbus tool, read holding register 3000 and see what comes back. If the tool shows 231 V at 3000 and ...
Both ends grounded turns the shield into a conductor between two grounds that are not at the same potential when a 755 is switching. Current flows on ...
A 2 wire sensor has no separate supply. It powers itself through the load, your input, so even when off it passes a small current to keep its electron...
Before the maths, prove the loop. Put a meter in series with the transmitter. What mA at the level you've got right now, and at the same moment what d...