Dynamic Axioline bus configuration, RS Uni Module and Solarworx functions blocks

PLCnext Engineer
1

Dear Community,
I’m using an Axioline RS Uni module to perform Modbus RTU, with the help of Solarworx function blocks.
The basic code structure is this:
SXbsc_SiAxRsUni20_1(…,
arrProcessDataIn := moduleProcessDataIn, // array of 20 bytes
arrProcessDataOut := moduleProcessDataOut, // array of 20 bytes
udtSerialIf := serialData);

SXbsc_MbMstCom_1(…,
udtSerialIf := serialData);

This works, however: I want to switch to dynamic configuration of the Axioline bus, which means, I no longer have moduleProcessDataIn / moduleProcessDataOut. Instead, I have two 512 byte arrays. The process data for the RS Uni is found at some index (which I know) inside these arrays.
How do I use this array together with SXbsc_SiAxRsUni20_1? Will it work if I simply copy from / to temporary arrays before and after calling the function block? I don’t think it will…

Best regards,
Daniel

2

That should work, to declare local arrays of the correct size and copy the data between those arrays and the corresponding process data bytes in the 512 byte array.

3

Dear Martin,
thank you for your answer. This simple solution does indeed work!
Best regards,
Daniel