From OpenSCADAWiki
Appending A. Data Areas of the ISO_TCP connections (source table of LibnoDave)
| Name | Code | Example item(German) | Example item(English) |
|---|---|---|---|
| Data blocks | 132 | DB3.DBD4 | DB3.DBD4 |
| Flags/Markers | 131 | MW4 | FW4 |
| Input memory image | 129 | EB2 | IB2 |
| Output memory image | 130 | AD8 | QD8 |
| Timers | 29 | T2 | T2 |
| Counters | 28 | Z2 | C2 |
| Direct I/O | 128 | PEW4 | PIW4 |
| System information of 200 family | 3 | ||
| Data (V-memory) in S7-200 | 132 | VW1234 | VW1234 |
| System flag area of 200 family | 5 | SMB0 | SFB0? |
| Analog input words of 200 family | 6 | AEW0 | AIW0? |
| Analog output words of 200 family | 7 | AAW0 | AQW0? |
| IEC Timers | 31 | T2 | T2 |
| IEC Counters | 30 | Z2 | C2 |