cghaba

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About cghaba

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  • Birthday 04/09/64

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  • Location Iasi, Romania
  1. Serial interface

    The question is (PLC+FX1N-485-BD connected to the PC running a terminal window and sending the forward command), if I type some garbage in the terminal window (not the acknoledge replay that VFD would send and which should be in format C - see VFD manual) in this way sending something to the PLC, the receive led should flicker or not? If not, does it means the receive part of the FX1N-485-BD interface is not functioning? Cristian
  2. Serial interface

    I said I have connected the VFD to the computer and using the VFD setup software I could sent forward and reverse commands and I could also read all the parameters set in the VFD. So, I guess the VFD knows how to send data back (if the request is well formed). The program in the PLC has to send the forward command to the VFD and it seems it sends it in the correct format (Data format A' explained in the VFD manual, chapter 4.2.36) as I verified connecting the PLC to the PC (serial port using a RS485/232 converter) and reading data received from the PLC in a Terminal window. Cristian
  3. Serial interface

    I use a Mitsubishi FR-E520 inverter. Unfortunately the troubleshooting page doesn't help me so much. My problem is to find if the receiver part of the FX1N-485-BD interface is working. The inverter is working when controlled through the communication port. I have tested it by connecting it to the PC and using the VFD setup software. Cristian
  4. Serial interface

    Hi, I try to use an FX1S PLC with the serial interface FX1N-485-BD to control an inverter. I am not sure that the interface is working well. The transmitter is working, LED is flashing and I also verified it connecting it to a PC and read signals with a terminal program (Hyper Terminal or TeraTerm). I am not sure that the receiver of the interface is also working, the receive flash doesn't flash. How can I test if the receiver of the interface is also working? I do not have another PLC with serial interface to connect them, for example, in a parallel link mode. Cristian
  5. Melsec F-40M

    It is an electrical bus (kind of tram) or a conventional bus (on gasoline)? cghaba
  6. FX-16MR PLC

    Hi, I have an FX-16MR with FX32ER. Does somebody knows where can I find manuals for this PLC? I want to know which programming cable I need (it has a sub-D-25 pins connector) and what software supports this PLC. cghaba
  7. Hi, I have a FX1N PLC with a FX1N-485-BD module and an E520 inverter. I wish to control the inverter using the PLC via a RS-485 serial link. Is it possible to control the inverter its PU connector? Which FX PLC instructions can be used to read and write to the inverter? cghaba
  8. Mitsubishi Inverters Forum?

    Is there a forum about Mistrubishi Inverters? I wish to connect a Mishubishi FX PLC to a Mitsubishi FR-E500 Inverter using the RS-485 connection and I have some questions to ask. cghaba
  9. Activate state relay using a data register

    Sergei, Thanks. It works fine. For my purpose, one RST instruction must be added in order to reset the current state. cghaba
  10. Activate state relay using a data register

    "Inclusive relationship" table in FX manual says P-SRET and STL can not be combined. What I am trying to do is to simulate a kind of subroutine in STL and I try to implement the return from subroutine. In the data register I store the state that makes the "call" and at the end of "STL subroutine" I need to return that state. For example, I have to make a program that has among other sequences 20 stages, each stage being a sequence of commands of the form: 1) go forward/backward m slots 2) get close/go far from machine n slots 3) rise/lower body p slots 4) advance/retreat hand1 r slots 5) advance/retreat hand2 s slots where for each stage, direction of movement and parameters m, n, p, r and s take different values. As I am used with C programming, I would put all this into a function and call the function 20 times in the right sequence with corresponding parameters. cghaba
  11. Activate state relay using a data register

    Jerrycat, I need to go to a state I memorized in D10. It could be any state from s0 to s999, not only s5. Sometimes D10 could be 102 so I should go to s102, sometimes D10 could be 455 so I should go to s455 and so on. It is not just one particular state (s5), but could be one among 10 or 20 states I would wish to go back to under certain conditions. cghaba
  12. Activate state relay using a data register

    And there is another problem with DECO instruction. When you use it to set a state relay, all other state relays in the 128-state-area are reset. In my program, I use 3 SFCs working in parallel, one that supervises the other two and the second controlling the third. At one moment there are at least 3 active states, one from each SFC. I would want to activate a state in the third SFC without resetting (stopping) the other two SFCs. cghaba
  13. Activate state relay using a data register

    I have already taken into consideration DECO instruction. The problem with DECO instruction is its range which is limited to 128 bits. My FX1N has 1000 state relays. One solution would be to split the 1000 state relay range into areas of 128 states. Then, using the data register where the state number is stored (ex. D10), I would need to compute the base address of the 128-states-area my state belogs to (this would be the D operand of the DECO instruction) and the offset from that base address (this would be the source operand of the DECO instruction). I was wondering, isn't there a simpler way to do the job? (I have also tried with index registers but not working). cghaba
  14. I have the number of a state relay in a data register, say D10. How can I use D10 to make that state relay active? cghaba
  15. Simple programming cable for Mitsubishi FX

    I have also tried the cable with a FX0-30MR-ES and a FX1S and it didn't worked. I verified the connections serveral times and all seems to be OK. All I get is communication error. cghaba