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https://www.futuredesigncontrols.com/Docs/MCT-DX_4.3_User_Manual_RevA.pdf

A fuse is faster to react than a circuit breaker under fault conditions, this reduces the amount of let through energy so less damage is done to the contactor. This is why a smaller contactor can be used with fuses for type 2 co-ordination. Using fuses will save you money in an initial design...

It would be good for you to provide a drawing of the electrical circuit you currently know and possibly get someone to trace out the rest of the circuit safely with the power off so we know what you are starting with. If you still need help, provide full part number of the drive. From what I...

Rockwell has some good information on setting up DeviceNet networks, do a search in their literature library for DNET-UM072. Otherwise provide more information if you still need help: What cable you are using? What baud rate? Where is your second terminating resistor?

The problem with old software is that it often only works on old versions of Windows. You can look up Rockwell Product Compatibility for the various software packages to work out what OS the software can be installed on. The CDs are probably only any good for nostalgia or arts and crafts.

Even though he is talking about wet/dry contacts, he does not want you to have it in your IO list as it creates confusion. Only have “powered by DCS” or “powered by field”. This could apply to Analog or digital, inputs or outputs.

I haven’t used the IP config tool but I think the PLC would show up there. Ping the PLC from your PC to check basic comms works between the two. If that works try File, Source Upload… from the menu to see if there is a source file. Otherwise you might be able to upload boot project to SD card...

Hi Marvin, Codesys is different to Siemens/ABB. With Siemens/ABB you can generally upload the program from the PLC, sometimes even with comments with newer PLCs. You can only upload from Codesys if someone has specifically downloaded the Source, most of the time this would not be done, only the...

I don’t think you need a special cable or adapter to connect. Please provide more information: -Is this a new PLC or is it already programmed? -Do you know the IP address of the PLC? -Is your PC Ethernet card setup with an IP address in the same subnet? -Are you familiar with Automation Builder...

If you are using WinCC flexible software, google: WinCC flexible connection. This will give you a 43 second YouTube video of where to find this setting. Let me know if you are using the previous software Protool.

Check the PLC MPI address is correct in the HMI project, otherwise check you haven’t accidentally dislodged/damaged the MPI cable from the HMI to the PLC or moved terminating resistor switches on MPI plugs.

X0 and X1 are not used directly in the program, they control the count in C251 which is in the program.

Open your Logix500 software and create a test project with SLC505 and a data block to see what the maximum size is, probably only 255. The wireless integration manual has an example for Logix5000. Maybe a chance to add a new CompactLogix with possibility of replacing SLC500 in the future.

Some soft starters only have thyristors in two out of the three phases, this is probably why full phase to earth voltage appears on the motor terminals with the motor stopped. For the second part, how is the soft starter wired to the motor? Does the wiring match the CONNECTION TYPE parameter in...

Put the PID controller in manual and see if you can make the system heat up faster at start up or cool down faster at shutdown than when it is in automatic. Your system will always have a lag at start up/shutdown if you have electric heating elements, also need to look at where and how you are...

You have a S7-1200 PLC, not S7-200. 1 - You need a memory card for the PLC to work 2 - I have restored Siemens memory cards with an image file when someone reformatted with Windows. So you can probably make your own memory card with an image file if you have a blank memory card the right size...

Software for projects should be kept relatively straight forward and well documented. For this text book question I am just trying to help someone solve a problem, not provide a comprehensive solution. This problem can be solved by converting everything to a base 10 number system as suggested...

The above works for > and <, 5 contacts in each rung, one parallel branch. To work out = you could just use XIO > and < bits or work it out separately XIO XIO and XIC XIC in parallel, 8 contacts, 2 parallel branches. I can post solution but didn’t want to complete someone’s homework, just point...

The profibus master will not have direct access to signal modules on the profibus slave. The slave will write to a Q area and the master will read an I area and vice versa for opposite data flow, IO areas configured in profibus parameters. You will need PLC code to copy signal module data to Q...

You only need to do bit comparison, not conventional number comparison. This can all be done in three rungs. XIO and XIC most significant bits to work out which is greater, if they match then look at the next bit.