MODBUS TCP/PN with IM 154-8

Hello,
2 requests does not mean 2 connections, but two times ENQ_ENR set with different values at the inputs START_ADDRESS and LENGTH.

So when you use the parameterization

data_area_1
db:10
start: 0
end: 3

date_area_2
db: 11
start: 8
end: 14

you should set
START_ADDRESS 0
LENGTH 3
for the first time you set ENQ_ENR

and
START_ADDRESS 8
LENGTH 12
for the second time you set ENQ_ENR

Make sure that you do not mix up hex and decimal values.
You must not use DBs like PARAM_DB or CONTRO_DAT as data DB with the parameterizateion!

When you want to read a bigger number of registers that can be accessed with on request you can define 1 big data area. e.g.

data_area_1
db:10
start: 0
end: 500

you should set
START_ADDRESS 0
LENGTH 100
for the first time you set ENQ_ENR

and
START_ADDRESS 100
LENGTH 100
for the second time you set ENQ_ENR

and so on.

The sample program shows in comment keys how and when you can change the input parameters of MODBUSPN.

Regards,
Kaulquappe

Hello,
your screen shot shows INIT_ERROR=TRUE and INIT_STATUS=A083.
It is important that you check if an error occurred.

You can also use the job_list block of this application sample if the sequence of requests is always the same:
Add-on blocks for Modbus/TCP communication

Regards,
Kaulquappe

Hello,
I'm getting crazy with the expression "it did not work". Which error is reported?

Regards,
Kaulquappe

I'm afraid, as long as you can't tell me the error reported, I can't assist you.

Regards,
Kaulquappe