Modbus Problem

[Johanb 0]

I have a OMRON PLC CJ2M and a SCU42 Modbus Card .

I am trying to communicate with a Danfoss FC051 by Modbus protcol .

But I can not find a testprog that lets me talk between the SCU & FC051 .

Is there some one that can help me with a example ( test ) prog

[Jay Anthony 118]

Download this file and use protocol macro to load to your SCU42 card.

http://forums.mrplc.com/index.php?/files/file/867-easy-to-use-modbus-rtu-master-for-cp1l-cp1h-cj1-cj2-cs1/

[Johanb 0]

Thanks Jay .

wil try if the program works .

I let you if Y encounter any problems .

 

 

[Johanb 0]

Hallo Jay .

If I tell teh program I am using a CJ2M plc it shows these warnings .

WARNING: Symbol Consecutive_Writes's data type (INT) is not compatible with the data type (UINT) for this instruction operand at rung 8 ( 6, 0 ).
[Ladder Section Name : Polling]
WARNING: Symbol Consecutive_Writes's data type (INT) is not compatible with the data type (UINT) for this instruction operand at rung 0 ( 2, 1 ).
[Ladder Section Name : Responses]
WARNING: Symbol TemporaryStartingDMErrorLocation's data type (DWORD) is not compatible with the data type (INT) for this instruction operand at rung 3 ( 6, 16 ).
WARNING: Symbol TemporaryStartingDMErrorLocation's data type (DWORD) is not compatible with the data type (UINT) for this instruction operand at rung 3 ( 1, 16 ).
WARNING: Symbol TemporaryStartingDMErrorLocation's data type (DWORD) is not compatible with the data type (DINT) for this instruction operand at rung 3 ( 6, 12 ).
[Ladder Section Name : PMCR]
[Ladder Section Name : END]

CJ1CJ2CS1ModbusSinglePort - 0 errors, 32 warnings.

What do I have to do to correct this ?

regards Johan

[Jay Anthony 118]

Don't worry about warnings; just worry about errors.  They're just data type issues and won't affect the program.

[Johanb 0]

Hallo Jay .

I have a erh light on .

how do I correct this ?

 

[Johanb 0]

Hallo Jay .

I am have a error on the SCU42 unit .

the error log is reponding

Error Code 0301/0103 Protocol macro operation error and I do not know how to correct this .

With rung do I need to change

I just want to read these registers .

Function code 03Hex Read Holding Registers
Fieldname	Example	Description
Slave Adress	05 Hex	Adress 5
Function	03 Hex	Read holding registers
Starting Adress Hi	0B Hex	Start adres register 2910 (2909 base 0)
Starting Adress Lo	5D Hex
No. Of Registers Hi	00 Hex	6 registers
No. Of Registers Lo	06 Hex
Error Check (CRC)	-

[Jay Anthony 118]

Did you load the psw file using protocol macro?

[Johanb 0]

Hallo Jay .

I have loaded the psw file into the PLC , but then encounter a connection error .

I used this Ethernet (Fins/TCP)  to connect to the PLC .

Network : 1

Unit : 1

But after loading the pws file to the plc .

I could not connect the plc with the setting above , and I can only use Ethernet/IP

the alarm is gone but it looks like the program cannot  find the SCU42 unit .

If you want I can attatch the program to you so you can mark where I went wrong .

regards Johan

[Jay Anthony 118]

What is the unit Number of the SCU42?

[Johanb 0]

The unit number is 2

try the numbers from 2 untill 15 but still no luck .

this my i/o table .

 

[Jay Anthony 118]

The program is setup for Unit 15. Also load the .psw file to Unit 15 with CX Protocol

[Johanb 0]

Hallo Jay .

I have loaded the psw file to unit 15 .

but could still not communicate with the SCU42 .

I have enter the port number ; coil numbers and still no communication .

Is there a way that a OMRON CJ1M cpu 31 can communicate with a Danfoss FC051 VLT ??

Thanks for all the support

[Johanb 0]

On 7-4-2016 at 3:35 AM, Johanb said:

Hallo Jay .

I have loaded the psw file to unit 15 .

but could still not communicate with the SCU42 .

I have enter the port number ; coil numbers and still no communication .

Is there a way that a OMRON CJ1M cpu 31 can communicate with a Danfoss FC051 VLT ??

I have used the EXEL program to setup the coil read request , but now I cannot find the the rungthat I have to replace .

 

Thanks for all the support