How to read v memory of s7 200 smart. Any on forum can please help out. 

DJ_1

Hello Athin,

Addition to JDaris, In S7300 PLC there in no any GET/PUT access setting.

First you need to follow the procedure as per attached document. You don't have to add IoT hardware  in PLC configuration. 

After installation of S7 Node red in IoT, open the  web ineteface of  node red ( type in browser IoT IP:1880).

Insert the S7 node into flow and configure it as per PLC and its variables.

For example IoT IP is 192.168.200.1 then PLC configuration can be as per PLC type

PLC	IP	SLOT	RACK
S7-1500	192.168.200.11	1	0
S7-1200	192.18.200.5	1	0
S7-300	192.168.200.6	2	0
S7-200 SMART	192.168.200.8	1	0
LOGO	192.168200.9	1	0

For S7 1500/1200,

1) Uncheck the “optimized block access” option in properties of the data block.

2.Enable PUT/GET communication in the device configuration of the S7-1500 PLC. Make sure the box is checked (this allows other applications to access PLC).

With the S7 node V1.3.0 you can read DB (DB1,INT0) as well as M memory(MW10)

For S7300/400/200/logo 

No need to configure any thing at PLC side for communication with IoT.

Closed cause question posted twice.

The second thread with the subject How to read v memory of S7-200 smart in iot2040 using nodered? is published within the conference IOT2020 / IOT2040.