How do I connect to s7-1200？There are no tracks and slots in s7-1200，errors：invalid pdu received or invalid buffer passed to send/receive '19' about gos7

[robinson]

Hi,
for s7-1200 just add slot=0, rack=0 and it should work.
BR

[XQacc]

Hi, for s7-1200 just add slot=0, rack=0 and it should work. BR

set slot=0, rack=0 ，errors：client.AGReadDB: ISO : Invalid Buffer passed to Send/Receive'19'
and used the packet capture tool to view protocol is ISO 8073/COTP，is need other setting？
connectionTypePG = 1 // Connect to the PLC as a PG
connectionTypeOP = 2 // Connect to the PLC as an OP
connectionTypeBasic = 3 // Basic connection
Is it related to this？

[robinson]

no, I think the configuration is that, but you are reading the wrong size of data... i suggest you take a look in the example

[iotopo]

@XQacc you may got a 8104 error code，hope help you：https://support.inductiveautomation.com/hc/en-us/articles/4414608266893-Error-reading-S7ReadResponse-Error-code-8104