Demonkey

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About Demonkey

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  • Country United Kingdom
  1. ABB PLC Need Help

    I am desperately looking for software for an ABB PM573 PLC. We had package plant installed some time back, unfortunately it is not a plc we use anywhere else. As a result, no programming software was provided with the plant. The control system has now developed a fault and need to have a look at the plc code to see why a timer is not resetting. We had the plant supplier looking at the system today, and he was as much use as tits to a bull. They use a third party to do their plc work. Is there any free software available that I can use to try to find the cause of the problem?
  2. PLC IP Address

    We have a CHP plant and is controlled by a Dief PLC. The PLC code is accessible via the web so I believe, unfortunately the service contractors have been given the punt and left without sharing the IP address, so we can't get access to diagnose errors/faults. Can anyone offer suggestions other than contacting the service contractors on how to get the IP address?
  3. We have four plcs on a DH+ network. We call these plc's RT1 ro RT4, with RT 1 being the main one. Now I have an error in the plc code where N150:33/15 is always on, when it should cycle, thereby resetting a timer. This address comes from a message block from RT2. How do I trace back to RT2 to see what address it corresponds to?
  4. Problem solved. The slots were disabled. Thanks guys.
  5. I should get back to the PLC later this morning and will check. So to enable, all I have to do is change bits?
  6. The PLC is in the RUN mode and operating correctly. yes the module was added to the rack connected via a backplane extension cable. Other modules in rack 2 are functioning correctly. I will check status of S11 & s12 when at work tomorrow. How do I check if all the slots are enabled?
  7. I have an SLC5/04 PLC and have added an additional 1746-IB16 DI module for additional inputs. The module was added into rack 2. The PLC channel configuration recognises the new DI input module as does the inputs data table. The data table list the correct range of addresses for the new module, but all the input bits are showing as 0 yet some of the inputs are on. The led's on the new module go on and off with the respective inputs. However, when I write a new rung of code using the new inputs, RS logix does not show the input changing state when I go online to the plc. i.e. the address does not go green when an input goes on or off. Can anyone advise what may be wrong.
  8. Need to add more I/O

    Thanks for that, will have a go tomorrow.
  9. I need to add another digital input card, a digital output card and an analogue card to an SLC 5/04. There are spare slots available. Do I just switch off the rack, add the cards and switch on again. Will the CPU automatically recognise the new cards and assign the relevant addresses to the new cards. If not, can anyone advise what I need to do. TIA