frenchy

Hello Splicer, thank you for your response. It indeed is a variable power supply that I am using as my test input (it will go up to 30vdc or so, but for this test I havent exceeded 11vdc for fear of damaging the IF2OF2 input). The "maxing out" is happening @ 10.5v (not 10v) and I am fine with that....what I am not fine with is that the counts never get to the specified 32760. They are stopping @ 32672. Is this normal? Are all modules different and you have to "see" what it really does? Is it like a car thats rated to go 200mph, but mine only goes 195? So running my new car @ 100% doesnt really mean 200, it means 195? thx, frenchy

Hello, I am using an IF2OF2 analog IO module in conjunction with a Micrologix 1100. I have both analog inputs set up for voltage mode with raw resolution. I thought I should expect 0v = 0counts and 10.5v = 32760 counts.... but, when I use a power supply to feed a test voltage into the analog inputs, I am seeing a maximum of 32672 counts on both inputs with an input voltage of approx 10.57 volts. The counts never rise above 32672 even when my input stimulus is up to 10.8v. Why are my modules "capping out" early? So, when I set up my SCP functions in RSLogixMicro, should I use the "truth" or the expected? Truth = 0-10.5v = 0-32672counts, so 0-10v should be 0-31116counts. Expected = 0-10.5v = 0-32760counts, so 0-10v should be 0-31200counts. My gut tells me to use the truth, but someday the IF2OF2 might wake up and do its job properly! Thanks for any input! Respectfully, Steve French 814.584.1220.office 814.730.0003.cell President, Volt Vision www.voltvision.com

Ken, Thank you very much for the reply. The problem is that my old OPC server didnt have the SLC 5/05 as an option....it only went up to the SLC 5/04. I'm not sure if buying a new OPC server that supports ethernet and the ML1100 directly would be smart or if I should run that expensive AB serial cable (can I build my own?) and keep trying to "trick" the OPC server into thinking it is talking to one of the old PLCs... Thanks again! I will figure it out. Fun learning curve! respectfully, frenchy

Micrologix 1100 <-> Lookout Protocol Drivers v4.5 <-> Labview v7.0 Hello all, I am helping a local company to use their existing seat of Labview v7.0 to talk over Ethernet with a new Micrologix 1100 PLC. We were hoping to use their existing OPC server that came with Labview (circa 2000) so that they do not have to purchase a new OPC server. Their Labview package is the "NI Developer Suite Professional v7.0 Control Edition" which comes with a "DSC Module" which contains an OPC server called "Lookout Protocol Drivers OPC Server v4.5 (build7)". This software came out several years before the Micrologix 1100 was born, but OPC is supposed to be a cross-platform, cross-generation standard isnt it? So, when I set-up the OPC server, it asks me which type of PLC I have and the only choices are AB_Logix (Micrologix 1500), AB_PLC2, AB_PLC5 (15 different flavors), and AB_SLC500 (5 different flavors). Can I use one of these that might be similar to the ML1100? I already ran the ethernet cable not a serial cable. My application is just reading and writing a couple of variables from/to the Binary, Integer and Float data storage locations approx once per second. Does anyone see a problem doing this without having to upgrade the OPC server to something that "officially supports" the ML1100? Thank you very much!! frenchy