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Hello, I want to ask "is there any formula that shows how to calculate the HMI data logging retention time?" For example, I want to set Trend and Alarm data retention time to 1 month. So how to calculate and setup in GX work3 HMI Designer? If you have any related documents, please share. Thank you. Have a good day!

Hi @Gambit Sorry for late reply. I'm using GX works 2 simple project with use label. I find it impossible to use the array data type in the ladder language. So I found a way to handle it gracefully with a ST language section.  

Hi @Gambit Because I need to handle about 1000 I/O and meet the project schedule. So I need register Z0. I noticed FX 3G CPU can't use array data type. I can't call tag in the statement. :))

Hi @Gambit Thank you for your answer. There are some gaps at address 40011, 40012, 40013. So I have to use 2 sets of parameters to read/write to 1 inverter.

Hi @Gambit Thank you very much. That's the answer I was looking for. Really confused by this simplicity :)) Have a good day!

Hi everyone, I'm looking for the answer myself. I have a QJ71MB91 setup as a master, 02 FR-E800 INV devices as slaves. When I disconnect a slave (FR-E800). My Modbus RTU network immediately crashes, the other device does not receive the control signal from the master station.  Is there any way to prevent this guys?

Hi everyone, Does anyone have an answer to this problem? Regards,

Hi @VeeB, I found the answer Thank you very much!

Hi everyone, Continues to be the Mitsubishi mining day series. I have a little problem with my project. How can I combine inverter Start/Stop control by terminal with Frequency setting by MODBUS RTU. If you have any manual, suggest me please! Thank you.

I have solved my problem. Here is a video that suggested the way for me. https://www.youtube.com/watch?v=bob00fG5lXs I need to address in Intelligence function module as: Target MODBUS Device Head Number = Address target - First address(40001) However, there is still a long way to go. I cannot access multiple register addresses on the drive at once. For example when I put: - Target MODBUS Device Head Number: 8 - Access Point: 1 Everything works fine. But when I set Access point = 6 (because I want to use target modbus: 13) the connection to this address fails. Thank you everyone.

Hi @Goran Vuckovic, Sorry I'm a newbie :)) Can you open more your suggestion. I had seen some video on the youtube that they're configuring the QJ71MB91 by Intelligence function. The didn't use the code.

Hello, Is there anyone know this case?

Hi everyone, I'm trying to setup connection between FR-E800 inverter and PLC 03UDVCPU via QJ71MB91 module. I have a problem where the modbus module keeps ERR led. In the error diagnosis, there is a message 7360.  I can't control inverter with QJ71MB91 module. Then, I tried  to control the inverter with RS485 cable and PC. It works. However, the connection seems unstable, often with the message "l llegen response" in "Write and Read" mode. Can u see my module configuration and give me some suggestion? Thank you very much!  

I have found a document it show that it is not possible to call array data directly in LADDER. https://www.youtube.com/watch?v=mAe_hcGpuAs

Hi @Gambit, A little error in the working process. I cannot assign variable with Z0 in LADDER program. Do you know any way? Thank you.