Conor

Hi Bob A, Does that not mean that you would actually get more than the 100k-300k out of a relay as you normally wouldn't run a relay at exactly its rated load, it would normally run under this? Also if you are using a dc relay you should look at the ones with the built in diode or if not built in add a diode across the load Conor

Thanks for that Ken. I suppose as you say on my older systems I may leave well and good alone and use only Flex. On my newer systems that are more Ethernet focused I may look into point Thanks again, Conor

I have used the banner as well. They are very good and easy to set-up. I have one issue where some of my signals were being lost, but that was where I had a lot of metal tanks and where trucks were passing. I installed a big arial (banner part) and this fixed the problem Conor

Thanks Bob, I will try and reset on Monday, as I am off today.

Hi guys, I have a PLC5/80 and a SLC L541C both on ControlNet. The PLC5 reads a value daily from the SLC. This has been working for a long time. I was asked to look at this today as the value was not being read. I looked at the message insrtruction and found the following error, "link layer timed out or received a NAK" I am able to connect/go online to both PLC's via ControlNet. The message instruction is going through the same paths on the ControlNet. Any idea's?? Thaks, Conor

Yeah, thanks Bob

Hi guys, Sorry for jumping intot his post. I ran into a problem tonight where an L35E needed to be changed out. I had three spares but none flashed up (15.4). Most of the time I was waiting around for the Flash to complete. I am off home now of the night (on call and its nearly 1.30am, been up since 6.15am), but on Monday I will flash up my other processors. I have one question. When you get a new processor out of the box the battery is disconnected. If I do the flash, do I leave the battery plugged in? I take it I do. If not, is the battery only for the program and not for the flash upgrade? Thanks, Conor

Hi guys, I was wondering if someone could tell me the best way to do this. I have a Control Logix L5555. It has a few cards on it. One of the cards is an Ethernet 1756-ENBT/A. Connected to this is an L35E. I am looking to read most of the tags into the Control Logix, but was wondering what was the best way to do this. I have set-up a MSG instruction and am able to read values this way. I have only read one REAL tag to test my comms. I would be looking to read DINT's and BOOL's and REAL's. I would say I need to read about 50 tags. If I was to use the Message instruction then I would have to write a lot of messages and I would also need to stagger them as not to overload the PLC (correct me if I am wrong) Hopefully someone can help me Thanks, Conor

Hi guys, I was able to wrangle some downtime to be able to download the programs to my PLC's. I set up one UDT produced/consumed in both PLC's to test connections, and it works fine. I was wondering about the RPI setting for the consumed tag. The consumed tag is in the Control Logix (1756-L55), running V16.21. The produced tag is in the Compact Logix (1769-L32E). I set the RPI of the tag that I tested to 4 ms. I needed to change 24 tags to produced and create the same amount of consumed in my L55. Is it alright to leave the RPI set at 4 ms in all of these tags? Another question. I have about 4 BOOL tags that I need to read. What is the best way of reading them? Thanks, Conor

Hi guys, As I have the tags set-up in the PLC in which I need to change to produced, instead of me changing this off-line and downloading, would it be easier for me to set up alias tags that are produced. I have memory space in the PLC. Ok, scrap that. I just checked and Alias is one of the options that produced is in

Hi guys, Sorry for not getting back earlier, but I was very busy and am only getting back to this now. I read through the link that NatiJacket included (thanks), and I tried to setup a produced tag, but of course everything was greyed out. I went off line and was able to modify the "Type" of the tag. If I change all of my tags that I need to Produced, do I need to download to the controller?

Thanks for your quick response. I will have to read up on the produced/consumed tags

Hi guys, I tried to open the file but it comes up with an error Unsupported processor Please open this project with a higher version I am running v8.1 Conor

Hi Ken, Last year I did the Rockwell course PID Loop Development and Tuning course. It was provided by Rockwell traiing here in Ireland. It was a very good course.

Hi guys, I have written code in a Function Block to calculate run hours on a machine. I am using the following. run_hrs.bmp I never seem to get 24 hours, even if the machine has ran for 24 hours. I always seem to get just under 24. Can someone tell me where I am going wrong Thanks, Conor

If I was to add a new periodic Task, what settings should I use for it? I have never set one up before

The 24 hours that I look at is 6 am to 6 am. Will this add some extra calcs when I go through Midnight?

Why is it that we can overlook easy things like this. I might try and use a Totalizer in the FB instead, as per TConnolly's post. P.S. Tried this but it doesn't work. Does this not need a REAL input? Thanks guys, I will let you know how I get on

Can you post an example please

Hi Michael, I suspected it may be something like that. I wish it was that easy . What happens when there is 23.3 actual run hours. It would round that off too? Thanks

Hi guys, I was reading malibu's post on 1788 EN2DN. On our site we have a lot of DeviceNet, connected to PLC 5's, 500's and 5000's. My question is where would I use this product? We have a good fiber optic network on-site, to nearly all of my main PLC's. We also have a ControlNet network, but I try not to add newer devices to this, I prefer to add anything new to the EtherNet Network. Conor

Thanks Paul. I may look into this for my site. Do you connect these into a managed switch?

Thanks for that Tulsa. I suppose if thats all there is then its better than nothing Conor

Hi, I was wondering if there is a setting in 5000 to show the rung titles on the Routine for easier navigation, as per RS5. In RS5 a + (expand) goes beside the rung, and when expanded you can click directly to that rung. Conor

Hi guys, Got it working with the following code; NEQ(Poly_Sol_OP,Poly_Sol_OP_Old)ONS(Poly_Sol_Auto_ONS_1)[MOV(Poly_Sol_OP,Poly_A_Dosing_SP_New),MOV(Poly_Sol_OP,Poly_B_Dosing_SP_New)]; NEQ(poly_A_dosing_SP,Poly_A_Dosing_SP_Old)ONS(Poly_Sol_Auto_ONS_2)MOV(poly_A_dosing_SP,Poly_A_Dosing_SP_New); NEQ(Poly_B_Dosing_SP,Poly_B_Dosing_SP_Old)ONS(Poly_Sol_Auto_ONS_3)MOV(Poly_B_Dosing_SP,Poly_B_Dosing_SP_New); [MOV(Poly_Sol_OP,Poly_Sol_OP_Old),MOV(poly_A_dosing_SP,Poly_A_Dosing_SP_Old),MOV(Poly_B_Dosing_SP,Poly_B_Dosing_SP_Old)]; It was a take on Bobs post. Thanks