Conor

Hi, My processor is an L35E V15.3 Operator enters a value (z) into scada. This through an FGEN instruction changes the output to another part of the process (see below). But the operator needs to be able to set the output to the process manually if the process needs to be tweeked. Basically FGEN sets output to get process to ball park, then if needed operator tweeks the output, ignoring the FGEN until the first value z changes again by the FGEN I am setting an output through an FGEN Function Block instruction. I am then with a MOV instruction moving this output (x) to another float (y). I need the operator to be able to set y in case the process changes. But if the FGEN output changes, I need y to change to this new value I would be very grateful for any help on this Thanks, Conor

Clear as mud. Thanks Bob. I will try this out now and let you know how I get on. Conor

I got it working. I had to look a bit more. Found the app ip buddy Conir

Brilliant

Hi guys, I have a set point that I need to change based on a percentage value entered by an operator So its like; 100% 3.00 95% 3.23 85% 3.46 And so on to 40%. I was going to do something like below (tagnames not inserted) [EQU(?,?)ONS(?),EQU(?,?)ONS(?)]MOV(?,?); Maybe this is the way that you guys might do this, but I was wondering if there is a better way, or another way of doing this. Thanks, Conor

Hi Chris, I was always wondering if you had an Iphone app. I came across this topic earlier today. When I came home I tried to download the app, but it keeps coming back that it can't be found. I am not sure if it makes any difference that I am in Ireland. In fairness the web page doesn't look too bad on the Iphone browser Conor

Hi Michael, It does seem that. Anyway at least I got it going. I will try on Monday or Tuesday to get your UDT method working. I was talking to my process engineer today and was telling him that I had got it going. I was telling him that the line doesn't have to be linear, and he was very impressed as he thinks that a non linear line (values) will work better for our application. Thanks again for all your help, I am really very grateful Conor

Hi, I finally got it working, my original FGEN that is. I kept getting XisOutOfOrder errors. So I reversed my values. X.0 was 100 now 40 Y.0 was 3 now 5.76 Values as per the table of values earlier in this topic Any idea's why this would have happened? Conor

Hi Michael, When you said that I needed to change the array size, can you explain. I can't seem to get the original FGEN working. So, I said I would try your way. I created a new UDT called XY, and made each a REAL array of 20, as per your suggestion. One thing on this, in your screen dump I see External Access as one of the tabs. I don't seem to have this on mine. Is this because my PLC is running V15.3? So I have this set up, I can't fine the tag, as per your second screen dump Thanks again, Conor

Hi guys, I tried but failed to get this working. I have attached a doc with screen dumps. Below is the configuration of the tags Blend_SP_IP is a REAL Poly_Sol_OP is a REAL Blend_Percent_Values is an array of 13 REAL's Poly_Sol_Values is an array of 13 REAL's I have played with the setting XY1Size, but this doesn't work, as you can see in the attachment. When XY1Size is set to 1 the fault clears but the output is wrong. I have added the values to the array as per the ealier values that I had posted Any help would be great Thanks, Conor fgen_problem.doc

Thanks Micheal, The output is linear, but this maybe subject to change as these figures are just starting values from the process engineer. I take it that if I use the FGEN then this may be the better instruction to use as the values may change in the future

Hi guys, It was a typo, sorry. I was trying to get the post in before I left here yesterday evening. Here are the values % SP 100 3.00 95 3.23 90 3.46 85 3.69 80 3.92 75 4.15 70 4.38 65 4.61 60 4.84 55 5.07 50 5.30 45 5.53 40 5.76 (just edited this to the right figure) I do have the FB add-on. Thanks for all of your inputs. I will read through them fully now to see which way I am going to proceed with this. Thanks again

Hi Eli, I would suppose that I would describe myself as being at an intermediate level with 5000. Some of the best things about 5000 compared to 500, in my opinion are; Creating new routines. You can do this online, you don't need to download Integers/Floats running out of them. Before if you had a float say F8 and you only had 10 elements in this you needed to download to increase the size. I suppose it depends on the industry that you work in, but I know that where I work having to put a PLC into pogram to download can cause major disruption/hastle etc. Also, I know it is an extra add-on, but the Function Blocks are very handy as well. Just my view. Please correct me if I am wrong guys. Conor

Hi mhowasso, It sounds like you have a doggy PLC to me. Do you have another one that you can put in to prove this? We had some issues over that past year with ML1000's where some of the inputs were going faulty. Rockwell replaced all units for me. Is there a good reason for the power to be turned off to the unit? Can you stop this happening? Conor

Hi guys, We have put a new E3-Plus overload onto one of our DeviceNet networks, it is on a PLC 5. We set up 4 words fine. We are wondering how we can change what parameters are coming into the first word. From the manual we have read that parameters 60, 61, 62 and 63 are used for reading from the device. Parameter 60 is set to 100, and therefore we are reading the currents from L1 - L3 on parameters 61 - 3. If we change parameter 60 to 114 will this change the first word to read as per page B-23 in the manual? And if we do this will the other parameters 61 - 3 change? We are just slightly confused reading the manual Thanks, Conor

Thanks again Ken

Hi guys, I have 6 VSE100 IFM vibration monitoring units. They are on existing machines. They are all connected back to my control room via Ethernet. I am trying to get these onto my Scada. Is there a way for me to bring them into an AB PLC? I was talking the IFM guy today and he said that I would need to buy there OPC server package. This is the reason that I am looking to put it through an AB PLC, as all of my PLC's feed into my Scada via RSLinx OPC server. FSGateway. Any idea's, suggestons would be most grateful Thanks, Conor

Hi Ken, Thanks for your reply. I will check the publication number tomorrow. I am sorry, but when I re-read my post today it was all over the place. Basically, parameter 61 looks at 21. Can I change that to another parameter? Also does it matter I I change parameter 62 to 4 (ave current) instead of 1 Thanks again, Conor

Hi guys, I was wondering if anyone can answer a question for me. If we use the Node Commissioning tool when replacing or adding a node to an exsisting DeviceNet network, do we have to download to the scanner card, and put the PLC into program mode? One of our PLC's is very critical and we always try not to have to switch it to program mode unless we really need to. It is a PLC5, but we have most flavours of Ab PLC's here. Conor

Hi guys, Finally got a chance to do this today. I was able to put the scanner card into idle and was able to change the config fine Conor

Thanks for that slcman. I will look in more depth at it tomorrow

Hi guys, In our plant we have a number of Westfalia Centrifuges. These run Siemens PLC's, they are Simatic C7-635 key PLC's. These are connected via Ethernet. I can go on-line to each of the PLC's by connecting into the sitch that they are all connected to. I know only a small amount of S7, but am ok with all the Bradly stuff. Can someone tell me if I can read from each of the Siemens PLC's via the Ethernet? I would be able to put a Bradley PLC near the switch if needed. If I could do this I can get a lot of machine info onto to my Scada and in my Historian At the end of the day it is easier for me to get I/O info onto bradley as 98% of our plant is Bradley Thanks, Conor

Hi Bob, Thanks for your suggestions. I will probably look into options 1 and 2. My historian is using FSGateway as the OPC server Conor

Hi guys, I was on to tech support. They have told me that the scanner card in my PLC 5 can be switched to idle when downloading an updated scanlist. The PLC 5 can be left in Run. I am going to try this out tomorrow, so if it doesn't work I'll let you know Conor

So I'm only half as old as DeviceNet then! Thanks for that Ken. I will get on to RA tech support about this. The scanner cards that we have in our PLC 5's are 1771-SDN. We have mainly series B and some series C. Thanks again, Conor