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I have a driver, siemens micomaster 440. I want to control a 3phase induction motor with this inverter via PC using MATLAB. I think there are a few method for this such as profibus, RS-485, USS etc. Which one is better? And I will send data which involves speed,direction, start, and stop info. which data sholud I send? I don't know structure of data. For instance, 1. byte = direciton 2.byte = speed .... .... n.byte.

I know I,Q,C,T,M but What are the memory area "L" , "D" and others in the programming applications? How can I find this terms in programming manuel? Icoldn't find...

Im new with Siemens. I couldnt understand OB,FB, etc. blocks structures and couldn't find using of these in manuels. How will I use these blocks when I generate a new program? Help please... Sorry I haven't indicated that I will use S7-300 so I've Step7 software

Thanks everybody I will examine....

Function 67 is RAMP function. And you can find this manuel in downloads.

Hi, I will control a D.C. motor with a FX2 PLC.Im using GX Developer. This motor start to run with acceleration. (Firstly slow and it will speed up with a ramp in 2-3 seconds). And motor will be slow down end of this motion. (This motion's Velocity-Time curve will be similar with y=X^2 function.) I know smoothly data operation in GX. How can I do with GX Developer, Which function can I use? Thanks for helps...

I ve post an example about blocks.There are 2 blocks. One of them is SFC and other is ladder. Ladder is General Control. Im using ZRST instruction in this ladder and its resetting SFC's steps. general_control.bmp

Hi homer, you can use in-line comparisons. In this compare, you can use K,H,K, KnX, KnY, KnM, KnS, T,C,D,V,Z. For ins. [= T0 D15]-------------() (Assume that Data15=2000 and T0 is 100ms timer) regards, untitled.bmp

M8000 -------------- -ll---------------[<> D0 D8] -------- [MOVP D0 D8] -------------- I know that's mean but, I couldn't use that inequlity. where can I find list of this middle "if" structures and using manuel? for FX PLCs...

Hi waus Im using GX Developer. but I don't know differences betwen GX and GX IEC. Im using zrst ınstruction.Firstly I build a general Control near the SFC blocks which is writing in ladder.And for example Im writing -||--------------[ZRST S0 S100] this instruction is resetting the first 100 steps

Hi Waynes. Thanks for help but I coldn't have a look link that you give.I think it's have a problem...

Thanks Waynes but no. I don't want to compare two statement. That was an example.I want to learn all of In-line compare statements.

Hi, Im using GX developer. Im testing the ladder with ladder logic test.Im forcing an input during logic test but Sometimes output is changing and sometimes isn't changing. İs there anybody who lives that problem?

JY992D48301 JY992D88101 JY997D16601 You can use these pdf names and look for in google with other key words for example FX,PLC, mitsubishi etc.

Thanks Panic, But I usually use BMOV instruction for data registers D. for example directly D1,D2,etc. And I know that it is used with KnX, KnY, KnM, KnS, T,C,D, V, Z (RAM) File registers, How can I use for M bits and Outputs?

Hi Crossbow, I think idea that you said is right. The problem is M bits which are not used as coils. You said that I find a solution using OR contacts. How do you use this contacts and what do you make "OR" with ? --------||---------- | X1 | |__?____|

Make sure the plc is in RUN that was great!....

Hi. Im using FX2-80MR PLC for a control project with GX Developer. But I couldn't use counters. I've looked user manuels and used like it's said. but counter isn't increasing. I ve put an input before a counter coil. Normally this counter must increase every rise edge of this input. Isn't it?

Hi there, I couldn't find a FX-2 user manuel or other pdf documents. I've FX1, FX2N,FX2Nc but there is no FX-2 doc. So I don't know that the differences between FX2 and others.. Help please.. Thanks

May be but I don't know they are same. If they are same, why do we use different name; FX1 and FX2

You can use GX developer. Using is simple . do a connecton test with plc from transfer setup menu. It must be COM4 if you are using SC-09 cable after installing software. And read from PLC by selecting PLC type.

yes Im not using high speed counter.I ve attached a simple example... thanks for help -------||---------(C01 K5) X1 -------||---------(Y1) C01 Here, Isn't counter counting that X1 input's turn on and off cycle?? But it is not. How can I count that how many X1 input's on-off number has realized?