mhowasso

I have a SLC5/03 that they are using the DH485 port to go to an HMI. I try to connect to the serial port and RSLinx does not see it. Is there some things to check to find out the reason this port is not working..?? Thank you

Hi All... Just trying to collect some opinions on HMI touchscreen operator panels. Does anyone recommend a certain brand, model, for ease of use, programming, graphics, colors, etc., etc. I need to replace some operator panels and was considering a new touchscreen HMI. CH PanelMate, AB PanelView, Dayton Easytouch, GEFanuc, etc., etc. Any suggestions or advice would be welcome. Thanks,

Hi All, What is the difference between a PanelView Plus and the PanelView Plus 6..??? Thanks

Hi Ken, Thanks...I kind of thought so too, but I wanted to rule out anything else first. I replaced that 5/03 with another one that I found and it worked Great...!! When I get time I think I will replace that 5/03 with a 5/05 and I think I will need to add a 1761-NET-AIC. Thanks again

Channel 1 is my DH-485 port connected to a 1747-AIC module connecting another rack and a PanelView. Channel 1 is configured for DH-485, Channel 0 is configured for DF1. IF I use my UIC connected to the DH-485 port on the AIC to my laptop I can go online just fine. But I can not connect my laptop serial port to the Channel 0 serial port on the 5/03 using a 1747-CP3 cable. RSLinx just can not see the processor. I have tried auto configure and manually configuring the driver, and it still won't connect.

I meant I have tried both ways..!! I have many SLC 5/02, 503, 5/04 and all work well with laptop and serial port. But this one processor I can not talk to serial port...only DH-485

I have checked all the above AND the JP4 Jumper (Protect Mode) on the processor. I am using a 1747-CP3 cable. My serial port on laptop works fine (tried on other processors and works just fine). I have a AB USB to Serial adapter and RSLinx still does not see this processor. If I use a UIC adapter and plug into DH-485 port it works fine and I can go online.

The 9 pin serial port. If I use the UIC I can connect to the DH-485 But curious why the serial port does not work.

Hi All.. Happy Thanksgiving..!! I have a MicroLogix 1100 running a High Speed door. The problem is that when I:0/7 (Photo Eye) or I:0/6 (Rev LS) goes true after the door starts down, that it does NOT reverse and go back up. Once it is down and I:0/7 or I:0/6 goes true the door does go up tho. Any advice or edit would be appreciated. Im just not seeing it but Ive been looking at it too long. :) Thanks HSDOOR.RSS

Well...This is what I ended up with. Works GREAT..!!! ThanksHSDOOR.RSS

Well... I will try that , but that would not drop out the door going down tho, would it..??

Hi All... I have two ML1400 with each IP addressed differently (192.168.1.100 and 192.168.1.101) What do I do in each of the ML1400 programs to turn a bit on/off in one by the other..??? Thanks

I am using a MicroLogix 1400 (1762-L32AWA) AC powered. Sometimes when the AC power is removed, the processor faults and I have to reload the program and then it runs OK. This only happens 1 out maybe 10 times. After I reload the program and go to run, it does just fine. I checked the error codes, and it is blank. I have tried to just do a clear fault, but that does not work. I have to reload the program and then it runs fine. Also, the 120vac that powers the Processor is coming from a UPS in the cabinet that should keep the power up nice and clean. Any ideas on what to look for..???? Thanks,

Yes, I agree. PID is one way but they can be a lot of trouble (regardless of what some claim). Especially on an Oven where variables can change continuously. Ovens can have their own personality depending on age, insulation, door seals, fan circulation, heating elements, thermocouple type, etc. etc. I have 35 Ovens that had PID controllers (that was always giving trouble) and I took them all out and put a PLC with Feed forward logic. I use a mercury relay and feed forward logic in my PLC and I can hold the temp in a 2000 degree F oven within 5 degrees with no problem and it is easy to maintain and troubleshoot. I use a 3 phase mercury relay for switching the power on and off at the speed you want to ramp up the temp and then hold it there. then ramp it down if required. You will have to play with the ramp speed timing when you get within a few degrees of your set point to prevent overshoot and undershoot to the desired target (set point). There might be other ways also, but the feed forward is simple to program and it works. But, everybody has there own way they are comfortable with.

Hi All, Im sure this has been covered before... Im using a ML1500 and a 4-20ma output flow meter. Due to the erratic flow in the line the analog signal is all over the place. What is the best way to smooth this signal out so I don't see all these variations..??? I don't have a CPT instruction on the ML1500 but there has to be a way. Just looking for the way you guys do this that gives you the best results. Thanks

Just so Im clear on this... FV = FV + C (NV - FV) Where: F V = Filtered Value (F8:0) C V = Constant Value (F8:1) (range 0-.99) The smaller the number the more dampening. N V= New Value (F8:2) F8:0 = (F8:0 + (F8:1 x (F8:2 - F8:0))) F8:2 - F8:0 = F8:3 F8:0 = (F8:0 + (F8:1 x (F8:3))) F8:1 x F8:3 = F8:4 F8:0 = (F8:0 + F8:4) F8:0 + F8:4 = F8:0 Is the FV FIltered Value F8:0 my original non-smoothed signal OR my new smoothed signal..??? Is the NV New Value F8:2 my new smoothed signal OR my original non-smoothed signal..??? When you label it as New I just assumed it is the smoothed value. Thanks for your patience in advance..!! I apologize if Im making this more complicated than it is. I just want to do it right.

Will do. Thanks

Thanks Mickey Just curious...are there are any other methods also..??

Hi All, I am using a MicroLogix 1500 with RSLogix 500. I have an underground fuel tank that I need to monitor the level of fuel in Gallons. It is a horizontal round cylinder tank that is flat on both ends. I am measuring the height of fuel in the tank using a 5 psi pressure transducer. I have done square tanks and vertical round cylinders with no issues, but this horizontal tank is just not working out. Looking for some help/advice or formulas that will work with a ML1500 or sample code that will work. Thanks,

Hi All, Well, I tried the logic in the ML1500 and while it works well and is closely accurate through out the full range (especially since before we had nothing) it is not accurate enough for our auditors. But using the original formula with arcsin in the HMI it works perfect. So that has been decided to be used. Thanks for all the advice and help...I truely appreciated it, and this has been very fun and educational for me. What seemed so simple in the beginning turned out not to be after all. I learned to be carefull assuming all PLCs can do everything, and not all tanks are simple to calculate volume. Thanks again, Mark

Hi... Exactly what are the values: -0.0187, 4.0443, 163.51 and -369.98 I need to know what these represent. Thanks

Hi All, I just wanted to say just how impressed I am with all this new information. I will try this soon and let you know how it works out..!!! This is kind of exciting..!!! IF this all works out I will post the program so someone else might benefit from it. Thanks again, Mark

Hi ASForrest.. No the 1500 does not use the CPT (thats another reason I always try and use the 1400 if possible). Thanks for the info and I will try this and let you know how it works out. IF this works out OK then I owe you lunch..!!! :) Thanks, Mark

Well...like everyone else I like it to be as accurate as possible..but I know "as possible" might be off a little. And its not like we are selling jet fuel..its just for reporting. But the problem is still the coding in the ML1500...some people have siad I cant do this in a ML1500 while others say it can be done, but no one has shared a line of code that shows how its done. In a way Im more confused now than when I started. Thanks,

Hi, Thanks for the info but how exactly would I put this in code in the ML1500..?? How would you write the ladder logic to achieve this..??? Any help would be appreciated and I will try what you say. Thanks, Mark