Dear Sir,

First of all I am really very very thankful for your quick response. I have no words to show my expressions I am really in great trouble these days 

Now come towards the problem that I am facing from last 7 days. I am trying to communicate Shinko controller DCL 33A with my PLC. I use pin 4,8 and 11 of CP341 RS422/RS485 and 1(COM), 3 and 4 of Shinko Controller (The manual of controller is also in the attachment, the important points that I used is also highlighted). I also swap the wire many times but it proved not fruitful for me.

Before Swap:

Pin 4 (CP341) with Pin 3 (Shinko controller)

Pin 11 (CP341) with Pin 4 (Shinko Controller)

Pin 8 (CP341) with Pin 1 (Shinko Controller)

After Swap:

Pin 4 (CP341) with Pin 4 (Shinko controller)

Pin 11 (CP341) with Pin 3 (Shinko Controller)

Pin 8 (CP341) with Pin 1 (Shinko Controller)

Note : I also try to use master - salve without GROUND, in short I try to use almost all options regarding WIRING point of view but no results.  Also verified the cable multiple times by mean of DMM (Digital Multimeter)

One more thing is also very interesting; whenever i follow AFTER SWAP wire connection both TX and RX light blinks but when we power OFF - ON the CPU the CP goes to fault mode and red SF light shows on the CP. So I am sure AFTER SWAP wiring option  is not the correct one.

Please find the attachments for more details.

I am really really very very thankful to you, please guide me.

Kind Regards

TIBI68

Sure I will try to support you.

So I believe that you are already very close when the Tx on the CP is blinking. What device did you connected to the CP and how? If you would upload us the document for that device and a short description of which pins you connected to which terminals that would help.

Best Regards.

TIBI68

Sure I will try to support you.

So I believe that you are already very close when the Tx on the CP is blinking. What device did you connected to the CP and how? If you would upload us the document for that device and a short description of which pins you connected to which terminals that would help.

Best Regards.

TIBI68

Sure I will try to support you.

So I believe that you are already very close when the Tx on the CP is blinking. What device did you connected to the CP and how? If you would upload us the document for that device and a short description of which pins you connected to which terminals that would help.

Best Regards.

 Dear Sir,

I also PM you,

Waiting for your kind help

Kind Regards

projects_mes

 

TIBI68

Sure I will try to support you.

So I believe that you are already very close when the Tx on the CP is blinking. What device did you connected to the CP and how? If you would upload us the document for that device and a short description of which pins you connected to which terminals that would help.

Best Regards.

 

 Waow Amazing I achieved the success, Thank you so much sir TIBI68. No words to express my thanks. I was really stuck at that problem and no one believe that communication of CP341 is possible without DONGLE but your hard work and very quick, humble and kind response make it possible and very easy. Even beginners can do it easily.  

Dear Sir (TIBI68) you is one of the most amazing personality on this earth. I have not seen as much nice personality in the field of automation. I want to become your student, if you do not mind  I really learnt a lot from you.

Thanks, thanks, thanks again. 

Kind Regards,

TIBI68

Sent you PM.

Hello TIBI68 ,

I used your example program MBMA341 some time ago. It’s really good; it was very helpful for me.

Last week I tried to use it again to communicate with a flowmeter, but for this time it doesn’t work. I replace flowmeter with a Modbus emulator installed on the PC and I could see that communication running very well.

When I ask flowmeter provider about this issue, he said that for access data from 42011 (2 registers) his device is waiting for tram:  01 03A4 1B00 02 97 3C.

He checked received tram and it was:  01 0307 DA00 02 E4 84 the same which I found in your instance DB (SEND_BUFFER[0] …).

If I take into consideration theory of Modbus, tram 01 03 07 DA 00 02 E4 84 is the good one; calculated from base 40001 + offset 2010 (start address07 DA).

However, tram 01 03 A4 1B 00 02 97 3C is good too, for some equipment: start address 42011 (A4 1B).

What can I do, because dongle is more expensive then flowmeter? Do you intend to build an example also for extended modbus protocol?

Nice day TIBI

Dear sipo,

thanks for using my library.

Please have look at page 15 of this topic, search and download the MBMAREQH.ZIP. The archive contains a different MBMAREQ function block to allow access to registers above x9999. I would appreciate if you click on rate or thanks button in order to show us your respect for our hard work and support free of charge.

Best Regards.

Thank you very much TIBI. I’ll try the new FB this week. I hope to be OK. I appreciate a lot your help and I am very glad to get a good friend like you.

Dear TIBI68;

I have seen that you have done a program which help you to use CP 341 without Dongle, and all people is satisfied, but i haven't found the version for TIA portal V15, can you please send to me.

I have to use CP341 as MODBUS MASTER with slaves who works with modbus RTU, the slave is a digital meter who must send to the master the voltage and the current, but when buying the CP 341 i have no idea for the Dongle.

I am waiting your help.

Best regards.