KB-34924: Reading a VD in an S7-200 via Ethernet.

How can an S7-200’s VD20 be read via Ethernet with M-Prot driver?

Solution:

To establish communication with an S7-200 CP243 via Ethernet, you must set Network field as ISOTCP243. Tag’s parameters should be:

VD20 Read (uncheck the option Write on the tag)

• N1=0
• N2=709 (REAL)
• N3=1
• N4=20