Error code A009

Dear Sir,

   I tried with

AN    "CONTROL_DAT112".Init_Error
R     "CONTROL_DAT112".Init

after

CALL  MODBUSPN , "MODBUSPN_DB_112"

in OB1.

But the same result.

Sometime getting A009 for modbus device 192.168.1.100 and 192.168.1.112.

Is it possible to give priority to device one and low priority to others? Because the data from 192.168.1.100 is more critical than other five devices.  I have total 6 modbus TCP device communication with CPU 315.

(2) I tried to write with function code 06 and 16 with writing holding register 42049. But when i am configuring for writing  it gives an error. Stop even reading communication.

Is it because i kept WRITE_READ = false?

Thanks

How to change the block version?

Thanks

Dear Sir,

    Thank you for your kind support.

After update v2.1,  the modbus communication is working fine.

Now i will try with writting holding register as you suggested and let you know the result.

Thanks

Dear Sir,

I have DB200 for Reading the MobusTCP read block from address 40001 to 40124.

another DB230  for writing 2 holding register to same modbusTCP device from 42049. I to configure same modbusTCP device for read and write operation.

i have not found any example of s7-300 Client to write the modbusTCP device.

Thanks

Dear Sir

Thanks for your help.

I want to understand how the DB and Modbus Register mapping works.

As i said, I am reading the 124 registers starting from 40001 to 40124 from a device having IP address 192.168.1.100.  

I assigned the DB200 for data storage.

I am writing single holding register 42049 in the same device. I have assigned the DB 230 for this data space.

 Now when i start job1 for reading data, Which Data area will be executed in operation.  I don't want read data in Data area_2.

When i start job2  for write operation on register 42049, which data area will be in operation.  In my case i have to use DB230 data_area_2.

In the Job_list 

The job DATA_TYPE,

START_ADDRESS

LENGTH

WRITE_READ , can be set.  i can't set which DB should be used DB 200 or DB230.

Thanks