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Hi I am new in Omron, most of time I spend with Siemens products so that's why I shyly want to ask about communication over EthernetIP in the case of PLC Omron. I am working with not my machine with PLC NJ301-1100 where are 3 axes on EtherCat, no nodes on Ethernet/IP, only HMI NA5. Primary task with cycle 500us (and additional periodic task 10ms but it is not important). I want to add Cognex scaner on EthernetIP. I use SysmacStudio. In first step I add EDS file and two structures IN (80bytes)/OUT(80bytes) to PLC, no algorythms. After downloading changes to machine in a while it stops with PRIMARY TASK TIMEOUT. With original program the task execution is ave 394us, max 467us. For NJ301 adding 160bytes is additional around 100us to communication cycle. Is that cycle part of each task (primary and others) or it is parallel proces? I am little confused. Additional communication time is 160*0,0015 + 160*0,56 + 2,15 + 7,5 = 99,49us. Am I correct? And this is the problem, I am out of the range of WatchDog? For now I didnt add any algorythms. In the future I will add new periodic task to PLC and this new InOuts will not be used in primary task. Thank You for any advice. ps I have found option for my inputs/outputs REGISTER TO SETTINGS FOR EXCLUSIVE CONTROL OF VARIABLES IN TASK. I created and chose new periodic task for them. Will it helps? I won't be able to check it until Monday so if You have any advices I will be gratefull ;) Best regars!  

Good day everyone!   I have some question relate with above subject. While i try make protocol for the CJ2M PLC.  i found out "Primary Expression (yN+x)" function but i cannt understand what`s this for. even i tried to find in the reference manual. i can not.  you can find it "Message Editor" -> "Message Variable" -> "Variable" sorry i tried to upload picture many times but it kept showing failed to upload.    hope so i could find the answer. thank you!

I hope no-one minds that I'm cross posting this from the RA forums, I just wanted to get as much visibility as possible since there doesn't seem to be anything on the net about this. Any issue, let me know, or feel free to delete it. I'm trying to use a startup macro in my manual mode HMI application to copy the current state of my outputs to the inputs so the machine does not move or change state when switching between auto and manual modes. However, when I run the application on my PanelView Plus400 HMI, I'm immediately greeted with errors like "<macro expression>: Unable to read the expression""Read from <tag> failed"Some info: This only occurs for lines that set a tag's value to another's; if I set the tag to just a numeric value (like in the first line of the sample below), its executes just fine.There are two separate HMI applications. One is for normal / automatic operation. This one is to allow the operator to manually activate individual solenoids on the machine to aid with building, setup, and troubleshooting; it is not seen nor used in production.This occurs long after the plc has booted (manual mode is not the startup application) - so running anything on first-scan is not an option - and the HMI has no trouble communicating to these tags during operation.They are RSLinx Enterprise tags, I think - not HMI tags; they only exist in the controller / ladder. I'm able to successfully browse to them online in FTView.The expression editor reports the "tag = tag" syntax is valid.Lastly, I'm using FT View v7, but I'm creating v5.10 runtime applications.Here is an excerpt of the macro: {[Gage]MANUAL.MODE_ON} = 1;{[Gage]MANUAL.STATION_1_ESC_CLAMP_EXT} = {::[Gage]Program:Station_1.STATION_1_ESC_CLAMP_EXT_SOL};{[Gage]MANUAL.STATION_1_MOV_CLAMP_EXT} = {::[Gage]Program:Station_1.STATION_1_MOV_CLAMP_EXT_SOL};{[Gage]MANUAL.STATION_1_PROBE_EXT} = {::[Gage]Program:Station_1.STATION_1_PART_PROBE_EXT_SOL};{[Gage]MANUAL.STATION_1_ROTATE} = {::[Gage]Program:Station_1.STATION_1_ROT_180_SOL};{[Gage]MANUAL.STATION_1_SLIDE_EXT} = {::[Gage]Program:Station_1.STATION_1_SLIDE_EXT_SOL};... and so on...FTView IS able to successfully execute the macro when I test it on the development computer while it is connected to the PV+ over ethernet. If the PV+ is not connected, or the application is running solo on the PV+, no dice / same errors. I have also tried using HMI tags in all combinations in the tag and expression by tying the RSLinx tag to an HMI tag. So far, they've had the same results as above. Absolute worst case, I could edit the ladder to latches or unlatches the inputs off of a one shot from the manual mode on bit, but it would require 7 manual program changes across many in-production machines and would be very time consuming. I've searched everywhere, and the manual's not been any help - maybe I don't know what to look for. Thanks for your time everyone, ~Anthony