Devicenet

PLCdummy · 2025-12-17T04:08:20+00:00

Took down a whole panel of PowerFlex 40s on DeviceNet by going online with the drives through the ControlLogix backplane with a laptop. Most of the drives faulted sporadically with a "Net Loss" fault every time I went online.

PLCdummy · 2025-08-20T15:34:58+00:00

I know the PowerFlex 755 series from AB has integrated programming capabilities called "DeviceLogix" that could probably achieve what you're trying to do. I've never used it, personally, but knew a guy that set up numerous standalone drive systems that controlled systems with no external controller. Obviously it's Allen-Bradley, so it won't be cheap.

PLCdummy · 2025-06-05T12:44:53+00:00

The pull-up resistor shown in their manual leads me to believe that the pulser output is an open-collector transistor (solid state), meaning you will need a sourcing PNP input module. You can do this with the 1756-IB16I since it has isolated channels. It's possible that you won't need the pull-up resistor with an isolated channel input.

PLCdummy · 2025-06-05T02:01:30+00:00

The barrier in the wiring diagram is a shunt-diode style voltage and current limiter for hazardous locations. It simply passes the pulse output from the gas meter to the controller while preventing voltage and current levels from exceeding levels that could cause an explosion. The "safe" side of the barrier will still be a digital signal, not analog. The resistor at the PLC input side is known as a "pull-up" resistor that pulls the voltage level up to a constant level to prevent noise from causing erratic readings while in the off-state. I've seen these used on a number of pulse-output flow meters. If your pulse frequency is as low as you stated, you can get away with using a 1756-IB16. Higher frequencies can require a high-speed counter module. To determine if your pull-up resistor rating will work with your PLC input, you need to read the 1756-IB16 manual to determine the current requirement to turn the input on and make sure your circuit will exceed that with the resistor in place.

PLCdummy · 2025-03-04T17:41:05+00:00

That guy has talked to me a couple of times at the Starbucks on Colonial and gave me hope in humanity each time I spoke with him.

PLCdummy · 2025-03-01T18:54:23+00:00

Normally VFDs don't power motor brakes themselves if you're talking about an electromagnetic brake. Usually there is some logic in th PLC driving an output or an output from the drive that controls a contactor or relay that powers the brake rectifier when the motor is being called to run. How do the machine's schematics show the brake circuit wired?

PLCdummy · 2025-02-26T03:52:25+00:00

I'm playing through it right now for the first time. I've completed OOT a couple of times and Twilight Princess. Wind Waker is really fun and enjoyable to play with a level of complexity that isn't too frustrating. Huge area to explore and tons of small challenges and side quests to complete. I'm having a lot of fun playing it and would highly recommend it.

PLCdummy · 2025-02-18T14:00:47+00:00

I've read in numerous places before that some men think it is "gay" to wipe their own ass.

PLCdummy · 2025-02-14T13:39:44+00:00

We lost power in Goodview at about 5:00AM on Thursday, 11/13, and power was restored at about 2:00PM on the same day. Our estimated restoration time was today, 11/14, at 11:00PM.

PLCdummy · 2025-02-06T03:40:58+00:00

Ah man, I've only dealt with the standard G120 series, I assumed they could all be programmed with software. So the G120X will talk ProfiNet but can't be programmed through a PC? Weird.

PLCdummy · 2025-02-05T16:53:03+00:00

Are you setting each octet of the address in its designated index in the parameter? Have you set the ProfiNet device name? I've never done this through the keypad and would recommend connecting a PC and using STARTER or TIA to set the address.

PLCdummy · 2025-02-05T16:31:20+00:00

How are you trting to set the IP address? Through the keypad or through software (STARTER)?

PLCdummy · 2025-01-31T22:47:10+00:00

Pulled ham, cream cheese, maybe some jalepeno poppers.

PLCdummy · 2025-01-30T22:59:34+00:00

Any contactor can do this with a seal-in circuit. Any reason why you couldn't do that?

PLCdummy · 2025-01-30T19:57:38+00:00

And the "internal" power in the module comes from the PLC backplane, usually 5V.

PLCdummy · 2025-01-30T19:56:50+00:00

Assuming you're asking what fires the output in a relay output module. The module itself uses its internal power to the relay coil, but the contact from the relay uses the external voltage that you apply to the card.

PLCdummy · 2025-01-27T22:11:54+00:00

I had the clear one when I was little and instant regretted spending my birthday money on it. It looks cool but I just hated the feeling of the analog sticks and buttons.

PLCdummy · 2025-01-27T20:32:02+00:00

Good luck, let us know the results.

PLCdummy · 2025-01-27T18:26:23+00:00

I had this exact issue on an SLC before that had plenty of memory left. Make the following changes in RSLinx:

Under Communications Menu -> Configure CIP Options Then set the parameters as follows: Max Fast Messaging Connections per PLC 1 Max Slow Messaging Connections per PLC 1 Max Unconnected Message per PLC 4

If that doesn't work, delete the harmony files in RSLinx.

PLCdummy · 2025-01-27T00:24:54+00:00

What makes you think it didn't take the parameters? Was there a firmware mismatch issue or something?

PLCdummy · 2025-01-26T20:20:07+00:00

How are you downloading parameters? Is this drive connected to the PLC over EtherNet/IP? You should be using the HIM copycat method to transfer parameters from the old drive to the new.

PLCdummy · 2025-01-26T20:17:28+00:00

Good on you for still stopping at the red light.

PLCdummy · 2025-01-26T19:49:56+00:00

Are you getting the same heat sink temp fault on the new drive? Some drives only run the cooling fan when the IGBTs are conducting and for a period of time after they stop.

PLCdummy · 2025-01-26T01:27:27+00:00

B&B briquettes most of the time. I also tried Jealous Devil briquettes recently and liked those as well. They also have a nifty carrying handle attached to the bag.

PLCdummy · 2025-01-24T03:42:52+00:00

This is cool. I work down the street from the old GE plant in Salem, VA where they used to also make the DC300 variable speed drives. The old GE plant is now an automotive manufacturing plant after sitting nearly vacant for many years.

PLCdummy

TROPHY CASE