Luka0204

Yes, via ABB CI867 module (which I don't have it), but I have existing CI853 modbus module and that's why I need to have modbus rtu communication.

Hi, I want to set communication between ABB CI853 Modbus Master module and Mitsubishi RJ71C24 module. I tried with predefined protocol (you need to set slave address, but ABB is master), also with non-procedural (with G_Output function block), but without success. I tried connect ABB with QJ71MB91, and it worked because you can then set slave address and a station number, and this can't be set with RJ71C24??? If someone had a similar problem, I'll be grateful for sharing a solution. Best regards

It is the same, using GX Works 2 or GX Works 3 (Q/L/FX Series Compatible Mode) if you are programming Q-series PLC.

Hi once again, communication between QJ71MT91 and R04 is solved in the following way: - R04 = in GX Works 3 install library MEU_RCPU_ModbusTCP_00B and program R04 as TCP Server - QJ71MT91 = set parameters in GX Works 2 under Intelligent Function Module I have 1 question regarding the GX Works 3: In Module Parameter setting I needed to set Open by Program in Opening Method setting to work this communication. I also found in manual the following thing: "When changing the operating status of the CPU module from external devices (such as the remote RUN/STOP functions), select "Do Not Open by Program" for "Opening Method" of "Module Parameter". If "Open by Program" is selected, an execution of the remote STOP function causes the communication line to close. Consequently, the CPU module cannot reopen the line, and external devices cannot execute the remote RUN function." Does someone encounter with possible problem from the quote or it works just fine with choosing Open by Program setting? Regards Luka

As far as I understand, A1SJ71QE71N3-T module doesn't support QnA Compatible 3E Frame (i think that is for Qna built-in ethernet CPUs)??! (CPU is Q2ASHcpu-S1, doesn't have built-in ETH port.) For A1SJ71QE71N3-T, I am using Fixed buffer protocol (library Eth_QE71_IEC_6)--pic in attachment. 

Hi, does anyone has program example of ethernet communication between FX5U (GX Works 3) and A1SJ71QE71N3-T (GX IEC Developer). I need to read and write in both directions. Thanks

PT1 or PT2 term = transfer function 1st or 2nd order . My aim is to simulate closed PID loop..something like an attached picture (matlab).

Problem is that I need to have an array of 300 constants (real numbers). I can program 300 times like this: DataArr_1[0]:=0.1; DataArr_1[1]:=0.5 etc, but that's not an aim. Another solution is that I copy all data from excel in Device Memory then write on PLC.  

Hi, i have excel file with 2 columns and cc 300 rows (saturation curve). How to import excel file in GX works 3 (R04CPU) and use data as two array variables [0..300]? I want to avoid manual writing around 600 values. Thanks  

Hi, how to make PT1 term in GX Works 3? I want to simulate PID loop Regards Luka

Hi, when I download on PLC (R04), sometimes for example. TON timer's output .Q is automatically set to true even though input is false (also on .ET time is 4h ...??). Also, sometimes some bool variables are also set to true even though they are not set by any kind of logic. However, when I physical reset the PLC (power cycle), mentioned problems don't exist. Does it mean that software reset isn't working entirely correct and I need to reset physical PLC (power cycle) every time after I download on PLC? Regards Luka

Hi, solution lies in special register SD 792 where for loop 1 I needed to activated bit b0 to set 'No limit restriction'. Regards Luka

Hi, once again question regarding the PID control. When I am using PID Control Instructions (Exact Differential) and I am limiting Manipulated Value (MVLL, MVHL), from 0 to 32000. But, when I run a PLC with these limits, I can't get MV more than 2050. In manual is mentioned that PID limit can be restricted (-50, 2500) or not (-32768, 32767). How to disable PID limit restriction to get limit range (-32768, 32767)? Regards Luka p.s. Thanks to Clear Mind for previous answer  

Sorry, I forgot to mentioned--- iQ-R (RO4 CPU)

Hi, I am using PID function (PID operation instruction) from GX Works 3 library but it doesn't work. I set all necessary parameters (sampling time, direction and upper/lower limit values + KP, TI). My input PID_Par is array of 25 points (in manual is written: "*1When auto tuning is not used, the same number of points are occupied as when the step response method is used."). For example, in GX Works 2, PID function works ok. Did someone have similar problem? Does someone have mitsubishi library (GW Works 3) with PID function that works correctly?   Regards Luka