![]() namespace Test You need to choose the Area (see S7AreaWHATEVER), the DB number, where you want to start, how many bits and the address where to store them. ![]() ![]() The string is in DB1200 and the first number starts at DBB2. The string is 12 characters long, and it's just numbers. I would like to read out a string with a trigger signal from the PLC e.g. With the Post from the Internet make this to connect with a S7-400. Is there a way to change this value? As it comes from the communication, is it a default or it varies with the PLC I use? I would like to send more bytes in a single Read/WriteArea. ![]() ![]() Whenever the function NegotiatePDULength arrives with a value for the PDU length, it is always 240 bytes. No, it's hardware and depends on PLC: S73XX = 240 bytes S715XX = 480 bytes "I would like to send more bytes in a single Read/WriteArea." There is no limitation, Snap7 splits the requests into different packets for you.
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