Highest Integer Value

[mhowasso 5]

Hi All, Using RSLogix 500 with a MicroLogix 1400.... I have 8 seperate integers (N7:0 thru N7:7) that vary from 1 to 4. How is the best way to monitor all the integers for the highest number...??? If any of the 8 have a value of 2 turn on output x. If any of the 8 have a value of 3 turn on output xx. If any of the 8 have a value of 4 turn on output xxx. Thanks Edited 10 Apr 2012 by mhowasso

[dmargineau 6]

BST EQU N7:0 2 NXB EQU N7:1 2 NXB EQU N7:2 2 NXB EQU N7:3 2 NXB EQU N7:4 2 NXB EQU N7:5 2 NXB EQU N7:6 2 NXB EQU N7:7 2 BND OTE O:X BST EQU N7:0 3 NXB EQU N7:1 3 NXB EQU N7:2 3 NXB EQU N7:3 3 NXB EQU N7:4 3 NXB EQU N7:5 3 NXB EQU N7:6 3 NXB EQU N7:7 3 BND OTE O:XX BST EQU N7:0 4 NXB EQU N7:1 4 NXB EQU N7:2 4 NXB EQU N7:3 4 NXB EQU N7:4 4 NXB EQU N7:5 4 NXB EQU N7:6 4 NXB EQU N7:7 4 BND OTE O:XXX

[mhowasso 5]

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 Edited 10 Apr 2012 by mhowasso

[mhowasso 5]

Rev B Program Would this work..??? If not, what is the best way..??? Thanks HIGHEST LEVEL LIGHT REV B.RSS Edited 10 Apr 2012 by mhowasso

[BobLfoot 302]

It almost works but you need a mov 0 N9:0 as your first rung otherwise N9:0 will run away. Also it won't work in the case where they are no 1's or but 2's 3's and 4's. Also it won't work in the case where they are no 2's or but 3's and 4's. Also it won't work in the case where they are no 3's or but 4's. I've reworked it with equ in ladder 2 so it works and in ladder 3 used no equ or moves and only 4 rungs to make it work. HIGHESt_LEvel_Rev_C.RSS

[mhowasso 5]

Hi Bob, Thanks for the great advice. You, Ken and Paul and others always make it look so easy. I do try and learn and remember and practice EVERYTHING that everyone posts. Just to make sure I understand your additional LAD3. Rung 0, IF any = 2, then turn ON output 4. Rung 1, IF any = 0 and 1, AND ouput 4 is NOT ON, then turn ON output 3. Rung 2, IF any = 1, AND output 4 AND output 3 are NOT ON, then turn ON output 2. Rung 3, IF any = 0, AND output 4 AND output 3 AND output 2 are NOT ON, then turn ON output 1. PLEASE correct me if I am interpreting this wrong. I also added the N9:0 = 0 when any = 0 as I think you recommended. And again..Thanks, Mark HIGHEST_LEVEL_REV_D.RSS

[BobLfoot 302]

Mark you ahve my LAD3 correct and it was put in LAD3 jsut to segregate it, doesn't ahve to stay there obviously. Your latest rewrite appears worthy of testing. let us know how things go.

[Conor 4]

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

[mhowasso 5]

Hi Connor, I am using RSLogix 500 Pro V8.40.00 CPR9, I dont have an earlier version.

[mhowasso 5]

Bob, Why in Rung 0 do you turn ON output 4 if any are a value of 2...???

[b_carlton 61]

Can all post the rung mnemonics like in post #2. Then all can replicate the program.

[BobLfoot 302]

FOR THOSE NOT POSESSING RSLOGIX AND WANTING MNEMONICS HERE THEY ARE FOR MY LADDER 3 NOTE THIS CODE IS SCAN ORDER SENSITIVE YOU CANNOT RUN IT ANY ANY OTHER SEQUENCE AND HAVE IT WORK. Hope this clears some things up.

[b_carlton 61]

Actually I have the free version of RSLogix. With the mnemonics I could paste them into the rungs and see the answer, though I pretty well understood where you were going from the descriptions.

[mhowasso 5]

Thanks Bob... This works PERFECT..!!! Again..I was making it more difficult than I should of. I never thought about using a binary weight. I have attached the final version in RSLogix 500. I know it may be a problem for those without ver 8.4 but I am not aware of how to save it in an earlier version type. If there is a way please let me know. Thanks Again for you help and patience. Mark HIGHEST_LEVEL_MONITOR.RSS

[BobLfoot 302]

looks nice glad it worked