Search the Community

what is latch clear operation and how is it triggered? Q03UDCPU connected to AB contrologix via ethernet sends data to L or latch relays and i read that it is only reset via latch clear operation. will for example L02 turn off if the bit is not triggered in the contrologix side?

is it possible to overwrite the linked word coming from the other station as stated in this refresh parameter?  http://prnt.sc/etejvj I will do OUT W703.11 which is written in the station 3 but I dont have access to it so I am asking if this is possible.

Hello! I have inventory that is in very good condition. Working, no signs of wear, professionally stored, very little in use. I sell altogether for a really nice price or piece by piece. I'm located in EU, however I can ship worldwide.  List:  BEIJER E700 VER 02400A   MITSUBISHI A61PEU 5x  MITSUBISHI A68RD3 3x  MITSUBISHI AY15EU MITSUBISHI A1S-38B MITSUBISHI A68B   MITSUBISHI A1S-61PEU MITSUBISHI A2SH-CPU-S1 MITSUBISHI A1S-64AD 4x  MITSUBISHI A1S-X80 MITSUBISHI A1S-Y14EU MITSUBISHI A1S-J71C24-R2 MITSUBISHI A1S-J51T64 MITSUBISHI A1S38B   5x  MITSUBISHI AJ55TB2-8R   2x  MITSUBISHI FX0N-40MR-ES 2x  MITSUBISHI FX2NC-485ADP MITSUBISHI FX-485PC-IF Free (with all other): DATA SWITCH A/B->I/O Some cables... Here are high res pictures of this exact items that are being sold:  https://www.flickr.com/photos/jurekphotography/sets/72157682320232626 Send your offer to PM or my e-mail: jure_zakon (at) hotmail.com  (insert @ instead of (at)).  Best regards,  Jure  

Hi everyone, Can any one share me the sample source code for melsec(MC) protocol, as I am working on this protocol.   Thank you in advance

Any old timers out there that can dust off the memories and help me program an old A0J2 processor? I can access the processor through Virtual Box DOS and MELSEC MEDOC.  I can upload the program and data registers and print everything.  The problem is that I want to change the program and having issues with the software & PLC.  The PLC has a ROM in it (ROM not an EPROM or EEPROM).  I can remove the ROM and set the jumper to RAM instead of ROM.  When I try to download the program I get "Param different" and the download stops.  I can reinstall the ROM and the PLC reloads OK and runs the program.  Where can I view/download/change the "Parameters" that the message is referring?  Do I need to clear the PLC somehow and reload everything? Any help is greatly appreciated.  Thanks in advance.

Q_L MELSEC Comms (MC) sh080008l.pdf View File MC Communication Protocol Submitter kaare_t Submitted 06/14/16 Category Manuals, Tutorials

I have a project where I have to read I/O, and potentially initiate programs on the Mitsubishi PLC. Seems I can use the Melsec Protocol but I have some difficulty getting started. I can communicate via Ethernet using GXWorks 2 so hardware-wise there shouldn't be anything wrong. I'm using QJ71E71, Q06HCPU, QX42, etc. Initially I open a UDP socket to the correct IP address and port (copy the port from GXWorks) and attempt to issue a request 3E/Binary, specifying the network, PC, Module IO, and station and it always times out. Is there any source code that just does a basic read of a memory location? I'm using C++ but I should be able to understand any code sample in VB, C, C#, or others. Also, is there any issue with multiple connections to the PLCs. Right now I quit GXWorks before I test but is this necessary. Thanks, Jeff

I have a Mitsubishi servo Pak #MR-J3-40B with an error 25 and 95 flashing. Could not find any help on the web or in the manual. Any help appreciated.

Hello: Is there any off-the-shelf Wireshark dissector for Melsec TCP which can decode the TCP portion of Melsec TCP traces? Thanks.

Hi guys, I have a problem with GX IEC Developer 7.04, i hope some of you can help me. When i try to connect with the PLC type - Melsec FX1s- 30MR-DC, there is an error: I check all COM port settings, and everything is ok. Com_port parameters: FX Parameters: Transfer setup: PLC Type in the program is the same like physical one (FX1s). I try to change all of this stuffs but there is no result. The cable I use for comunnication is this type: Thank you very much in advance. Have a nice day! eng R. Bukov

I have very little experience with Mitsubishi logic and I need to modify an existing program from 1999. I am looking for some insight on how to approach this request. The required change has to have Y035 energize 2x during one scan of the program. (Double stroke the cyclinder) FX2n PLC Y035 connected to a spring return solenoid GX Developer 8.20W (Originally coded with Melsec Medoc 16bit) M855 M630 -------| |------------------------------------------------| |-------------------------------------------------------------------------------------(M857 ) MAN MECH | PWR ON EXT MECH TEST | CYL | | | M645 M860 M760 | ------| |------------|/|------------| |-------------| CYC OK INDX2 OK INDX1 START RET M857 M858 M859 M630 ------| |------------|/|------------|/|-------------| |-------------------------------------------------------------------------------------------(Y035 ) EXT MECH TST OK TST FAIL PWR ON MECH CYL CYL RET RET EXT I can upload source code if anyone is interested. Any suggestions would be greatly appreciated!

hi just browsing for some ideas, I'm not proficient at programming but thought I could learn and have fun at the same time but now im stumped (and just moved house so a little preoccupied) anyway... I made a test rig, 14 leds driven direct from the y outputs with two sensors x1 and x2 the idea being to eventually put them in the stair case so when the beam at the bottom is triggered they will lead up the stairs in sequence and visa versa down wards, now I managed to trip x1 then sequence the leds and reset itself, all using timers, but when it came to going the opposite way easy I thought just reverse the program, but when I did this I got the dreaded double coil and I spent a couple of days on this to no avail, so here I am. open to any suggestions better ways not using timers anything to get me started eventually I thought I could have a selector switch for different patterns, but im getting a head of myself!