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Rev B Program Would this work..??? If not, what is the best way..??? Thanks HIGHEST LEVEL LIGHT REV B.RSS

Hi, Thanks...Please look at the Rev B program attached and see if this way of turning ON only one light to represent the highest level. I would like to only have one light ON (to represent the highest level), but not sure if this will work. Thanks Again HIGHEST LEVEL LIGHT.RSS

Hi Browndog I too am using a AMCI Module (3601), and I also downloaded the sample programs which were of little use because of the extra logic shown in the examples of how to use features such as blending, etc. which I do not need and was confusing. I can send you a copy of the program I did make, which is only for simple motor running. I use an MPG (quadrature feedback) for manual position mode operation which I set the logic up as a follower (one pulse in/one pulse out), and then also as a auto speed mode operation where I use a 0-10vdc analog signal from a 10k pot to give me 0-100% speed. Mark

Hi Ken, Thanks for the reply, I appreciate it. OK, this what I have done so far. I have connected "one" sensor up to my ML1400 and and wrote a program to monitor this 4-20ma signal and scaled it to 0-100 PPM. The reason I have only done one sensor (and I just laid the cable on the floor so I can move it around and just get some readings in several areas to kind of see exactly what kind of values I could expect) this way I can identify exactly where I want to mount the sensor permanently (there will be six total). This allows me to see how all the things like doors opening, part removals, etc. has what kind of effect on values. I am using a four color stacklight (Green-Blue-Yellow-Red) to indicate when the value is within these four levels (0-100PPM). Green = <5 Blue = 6 - 15 Yellow = 16 - 25 Red = >25 I currently change to the appropriate color immediately when the level enters that level, but on red I latch it and sound a horn that can only be reset via password by a supervisor. Now that I have some kind of idea of what values I will be getting, I want to take a reading every second and average this reading over a 10 second period to give me six averages per minute and use this in some kind of hour formula. Here is where Im wondering what to do now...?? Also, using this TWA way, what IF an operator is working in an area that spikes high but the TWA is OK, he could be dead but the TWA says he should have been OK..??? The vapors I am sensing is Trichloroethylene in a degreasing department. The program I have is working great for immediate level reading (Phase 1) but I feel I need to now move to (Phase 2) and make it per the TWA format, and this is where Im am getting lost. Thanks..and any advice is greatly appreciated. Mark

Hi All, Working with a MicroLogix 1400 with a 1762-IF4 Analog Input module measureing a signal that is 4-20ma. This is from a gas sensor with a scaled value of 0-100ppm. I need to provide a time weighted average where if the gas value average gets over 10ppm during an 8 hour period I set off an alarm and then reset this average after the 8 hours, then start another 8 hour period. Looking for some advice how how this "Time Weighted Average" will work. Whats the best way to start this..?? As always, all advice is appreciated. Thanks

Hi All, Is anyone using a AMCI 3601 Single Axis Stepper/Servo Module with a Micrologix...???? Im looking for a working file that might help me understand how this works. I have looked at the sample program that AMCI has on their website, but its not much help. Thanks,

Hi Michael, Thanks for the info. I looked at the file, but I dont think this is what Im looking for. I read the link that you sent but the question I have now is..where and how was the 500ppm arrived at..?? Was it the max value during the shift..?? Or the average during the shift..?? This could have an impact on the calculation.

Hi Michael, Thanks for the Info. Im going to look at this file and let you know. But I have a question... Is the term "Time Wieghted Average" just a way of saying.. IF a value goes above/below a setpoint value for xx time then turn output ON..???

See below

Hi Ken, Well, I guess Im at the point I have to ask..... Is it possible that someone could rewrite this program to make it easier for us more common folk to use and troubleshoot..??? Why couldnt a person just use SCP instructions for all the analog IO and use Floating Points and or Integer values..??? I read the tech notes you mentioned and there was even a few more suggested as well. I must admit I dont feel any better about this now than before tho. Im kind of a KISS kind of person and this kind of stuff can make you feel really, well, you get my meaning. Thanks, Mark

Ohhh Ken... You will never lose that mystery and power....ol master of the universe..!! Thanks, Grasshopper

Hi All... Thanks Ken for ALL the hard work. This helps out a bunch, but I think those Swede's could of made life for me a lot easier by using better programming. There just seems to me to be an easier way to accomplish this. I still dont see how (and its just my lack of experience with this) how to determine where the actual analog output for the Nitrogen, Hydrogen, Shroud Gas, etc. is located in the program. Thanks Again, Mark

OK...Sorry I took so long.... Flex IO Rack 1 1. 1794-ASB 2. 1794-IE8 3. 1794-OB16 (This one I know is O:2.7/xx) Flex IO Rack 2 1. 1794-ASB 2. 1794-IB16 3. 1794-OB16 4. 1794-OE4 5. 1794-IF8 Thanks,

Slot 2, Scanner Module I found out the digital, but I dont know how they are scaling the analog 0-10vdc output/input. You mentioned 0-1000. How do I know for sure..???

Hi All... How do they bring in an analog signal 0-10v to a flex IO analog module connected to a scanner card without a SCP instruction..??? What would I look for to track this down..?? Ref Attached file Thanks, MC5_16.RSS

Hi Jeremy, Thanks for the explanation. I appreciate this info. I tried the LIM and it really is kind of neat. I ended up putting my high limit in the low and the low limit in the high, and my out put was then false if it was within the limits and went high when it was out of the limit range. Exactly what I wanted and only one instruction. Just backwards from what I had first thought but after your explanation it makes sense now. Thanks, Mark

Hi All, Im using a ML1400 with two 1762-IF4 modules configured for 4-20ma. Im going to be monitoring 6 sensors that give a 4-20ma output and I want to use a stack light with green-blue-yellow-red lights for 4 range indicators. Green being the lowest and red being the highest. I want to keep track of the 6 sensors and when any of the six are in a higher range then turn that appropriate light on. So my question is, is it simpler to use less than and greater than instructions and or them together or use LIM instructions and look for out of range/in range type logic..?? Is there advantages of using any particular way..?? Has anyone done this type of thing and had better success one way or the other..?? Thanks

Its on a jet engine test stand that has been running for about 2 years. They have complained about a real intermitten problem, but I never have seen it. So today since I had the time and saw this fault, I thought I would try and find a way to prevent this. I removed the IF2OF2 (which I had previously mistakenly said IF4) and the problem still happens. So this narrows it down to the IT4 module in slot 1. I also find it odd that my IOS file continues to show all 0's even with the 179h error active in the Processor Status Error file.

Hi Paul, I would like to ask you a question if you dont mind. I have a MicroLogix 1200 with a 1762-IT4 in slot 1 and a 1762-IF4 in slot 2. Im sitting here at work and there is a storm going thru with intermitten power blips. I know that putting a UPS on the incoming power would cure this problem, but I would like to know if there is a configuration change I could do. When the power blips on/off I get a fault led on the 1200 and when I go look at it I see the following: Major Error Halt S:1/13 =1 Expansion Module 1 Generated an Error Major Error S:6 = 179h Is there something I can do to keep this error from coming on..?? Maybe putting an Unlatch for S:1/13 or something. Thanks, Mark

Thanks I just thought I would try to avoid any pitfalls you might have encountered. Mark

Hi All, I have 10 furnaces with 6 thermocouples in each. The ovens are all positioned within 150 feet of the control cabinet. I would like to know the best way to get ALL the thermocouples back to this cabinet with 1 PLC (preferably a Micrologix 1400). Is there a flex IO or point IO or something that would do what I need..??? Maybe give each oven a IO device with a IP address..??? From that 1 PLC I will then display ALL the values on 1 HMI and collect all the data. Any advice would be appreciated. Thanks

Whats a good heating element controller brand..??? (4-20ma input)

Hi Paul, Would it be easier/cheaper to just but a 1400 on each oven to monitor and control and then tie the 1400's over ENET to the one HMI for data collection..??? Mark

Thats correct, there would be 60 thermocouples, and on my 1400 I can use up to seven cards, so even if I used all 7 as TC cards (7x4=28) I would still be 32 short. I also would like to control each oven as well. They only use a ramp up, soak, ramp down profile. This is why I thought some kind of remote station at each oven would work better. Again, maybe this is not possible, but you never know until I ask. Or maybe a ML1500 would be better, or even something else. Im just looking for what all my options are. Thanks, Mark

Hi All, See attached program file. I have a little problem with a MicroLogix 1500 (RSLogix 500). I am Latching B3:5/8 by pressing input B9:0/8 I am Unlatching B3:5/8 by pressing input B3:5/10 It works very well using the two seperate inputs. What I want to be able to do is press B9:0/8 to Latch B3:5/8. And then press the same B9:0/8 again to Unlatch B3:5/8. I have tried several things to try and do this but it either will not allow the latch to work or the latch will work but it will not unlatch. Any advice or edits would be appreciated. Thanks TEST.RSS