Enhanced Vision OPLCs support SD cards that enable application data to be stored and remotely accessed. SD Suite enables you to view and manipulate that data, as well as format cards and perform other tasks. Note that SD Cards also enable , complex web-page hosting, and application cloning between OPLCs.
Remote Operator enables you to use a PC to view and work with a remote controller's HMI panel. You can define any number of controllers, then open multiple sessions to view them simultaneously, while docking or cascading windows according to your preferences.
DataXport creates logs of run-time or stored data from Data Tables and operand regions within Unitronics PLCs. DataXport saves the data logs in .ulp format. You can open these data logs using DataXport's companion application, DataXls, and then export the data to Excel files.
This tool downloads compressed control applications to local or remote Unitronics controllers. You generate a compressed application from within either U90 Ladder or VisiLogic. Your end user will be able to download the application, but will not be able to view or modify it. The tool can download applications and OS.
Do MB 21 and MB 30 stay on? If so, you may be trying to communicate too fast. Use something like this, but replace MB 21 & MB 30 with what you REALLY want to initiate the comm (or just delete them entirely if you want to continuously run the data transfer). You can change TD 20 preset to whatever works for you, but 100ms should be plenty slow to avoid dropped packets.
By this I mean that the inductive doesn't necessarily need to actually be on the arm. Most of the time you can find a convenient bolt head or similar within the drive train that can be used very easily by adjusting the sensor's mounting point to be in exactly the correct location. If the bolt etc is mechanically connected to the arm then it isn't going to vary! Although not applicable to this, in some instances where all else was not possible, I have even machined slots in motor shafts at the fan end to enable a definite read that the motor is actually turning correctly, an inductive picks this up very easily.
Or put a leg on the arm that will prevent the scatter.
Busy at present....just a quick drop in during morning start.....wait!
I changed both the read and write to how you show above and the erratic behavior cam back which is why I think i ended up going to the one shots. I didnt even try reducing my read write timer and the behavior returned. By erratic, I mean when i look at the total sessions, the modbus read is outpacing the modbus write by a factor of three. All I changed is what you list above but did it to both the read and write.
When I change it back to the one shot contacts it works again and the total sessions stay equal to each other (well technically they are not equal because the read is always 1 higher)