
Appendix E: Device Data Format
Siemens Energy & Automation, Inc. 93
E.11 Device Type: S7-I/O
Real-Time Device Data Stored in PLC (S7-I/O)
Function Register Location in
PLC Block
1
1. This register location represents the sequential registers and their numbers within the device itself; as illustrated in Figure 5.1 in Chapter 5, the data
register numbers in the Modbus Master and the DTU3005 unit itself will vary from these register numbers.
Range or Contents
Inputs 1–16 0 Bits 0–15:
Inputs 17–32 1 Bits 0–15:
Inputs 18–48 2 Bits 0–15:
Inputs 49–64 3 Bits 0–15:
Outputs 1–16 4 Bits 0–15:
Outputs 17–32 5 Bits 0–15:
Outputs 18–48 6 Bits 0–15:
Outputs 49–64 7 Bits 0–15:
Event Counter 1 8 I0.0 Event Counter
Event Counter 2 9 I0.1 Event Counter
Event Counter 3 10 I0.2 Event Counter
Event Counter 4 11 I0.3 Event Counter
Event Counter 5 12 I0.4 Event Counter
Event Counter 6 13 I0.5 Event Counter
Event Counter 7 14 I0.6 Event Counter
Event Counter 8 15 I0.7 Event Counter
Event Counter (Total) 16 Total Event Counter
Reserved 17–21 For Future Expansion
Device Command Data Retrieved From PLC (S7-I/O)
First Command Word (Command Word) Second Command Word (Data or Value)
0 = No Command to Perform Unused for Command 0
1 = Clear Event Counter (s) Event Counter to Clear
1 = Event Counter 1
2 = Event Counter 2
3 = Event Counter 3
4 = Event Counter 4
5 = Event Counter 5
6 = Event Counter 6
7 = Event Counter 7
8 = Event Counter 8
255 = All Event Counters
2 = Turn Output On Output Number (1–64)
3 = Turn Output Off Output Number (1–64)
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