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I need to display some trend data using the trend HMI element. It works fine either in HMI ou web-visu mode.
The question is, the display starts with an empty display every time I restart the visualisation. In fact, I want to connect to the PLC from time to time and watch the last period of time.
So I checked on the "store trend data in the PLC" option, in the target settings-visualization options. The ringbuffer TREND_TASK is correctly generated, as explained in the online help.
I imagined this task stores the data in the PLC, just for my purpose! In fact, I see no difference at all: every time I reconnect to the PLC, the trend displays at first an empty x/t grid, filling it as time goes on.
My target is a Wago 750-873.
What is the intended function of the "store trend data in the PLC" option?
Remark: I don't want to send the data over the network because I can't guarantee it's always ON. Is it possible to work in that configuration?In the trend configuration, the "recording option" is set to online. I tried to set it to "History" without configuring a filename, but CoDeSys crashes by saving the project.
Thanks a lot for any help
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Hello good afternoon, excuse me I would like to ask for your help to be able to visualize the history of trends in visu web, I don't know how to configure the software to save data in the plc, and see the history in the visu web.
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
I need to display some trend data using the trend HMI element. It works fine either in HMI ou web-visu mode.
The question is, the display starts with an empty display every time I restart the visualisation. In fact, I want to connect to the PLC from time to time and watch the last period of time.
So I checked on the "store trend data in the PLC" option, in the target settings-visualization options. The ringbuffer TREND_TASK is correctly generated, as explained in the online help.
I imagined this task stores the data in the PLC, just for my purpose! In fact, I see no difference at all: every time I reconnect to the PLC, the trend displays at first an empty x/t grid, filling it as time goes on.
My target is a Wago 750-873.
What is the intended function of the "store trend data in the PLC" option?
Remark: I don't want to send the data over the network because I can't guarantee it's always ON. Is it possible to work in that configuration?In the trend configuration, the "recording option" is set to online. I tried to set it to "History" without configuring a filename, but CoDeSys crashes by saving the project.
Thanks a lot for any help
Hello good afternoon, excuse me I would like to ask for your help to be able to visualize the history of trends in visu web, I don't know how to configure the software to save data in the plc, and see the history in the visu web.