Siemens SIMATIC NET S7-1200 User Manual

Configuration and operation
5.5 Datapoint types
CP 1243-1 DNP3, CP 1243-1 IEC
Operating Instructions, 02/2014, C79000-G8976-C312-02
37
To allow the value resulting from local events or interventions to be transferred to the master,
the data point in question requires a channel for mirroring back.
This mirroring back function is enabled using the "Value monitoring (Reporting Changes)"
option in the STEP 7 configuration, refer to the section "General" parameter group
(Page 50).
Remember that to use the mirror back function, you need to interconnect the local values in
the controller with the relevant PLC tag of the data point.
Time stamp of the DNP3 CP in UTC format
Time stamps are transferred in UTC format (48 bits) and contain milliseconds since
01.01.1970.
CP 1243-1 IEC: Supported data point types
Table 5- 2 Supported data point types, IEC types and compatible S7 data types
Format (memory
requirements)
Data point type
IEC type
Direction
S7 data types
Address area
Bit
Single point information
<1>
in
BOOL
I, Q, M, DB
Single point information with time tag
1)
<30> in BOOL I, Q, M, DB
Single command
<45>
out
BOOL
I, Q, M, DB
Byte
Step position information
<5>
in
BYTE
I, Q, M, DB
Step position information with time
tag
1)
<32> in BYTE I, Q, M, DB
Regulating step command
<47>
out
BYTE
I, Q, M, DB
Integer (16 bits)
Measured value, normalized value
<9>
in
INT
I, Q, M, DB
Measured value, normalized value
with time tag
1)
<34> in INT I, Q, M, DB
Measured value, scaled value
<11>
in
INT
I, Q, M, DB
Measured value, scaled value with
time tag
1)
<35> in INT I, Q, M, DB
Set point command, normalised
value
<48> out INT I, Q, M, DB
Set point command, scaled value
<49>
out
INT
I, Q, M, DB
Integer (32 bits)
Bitstring of 32 bits <7> in DWORD,
UDINT
I, Q, M, DB
Bitstring of 32 bits with time tag
1)
<33> in DWORD,
UDINT
I, Q, M, DB
Integrated totals <15> in DWORD,
UDINT
I, Q, M, DB
Integrated totals with time tag
1)
<37> in DWORD,
UDINT
I, Q, M, DB

Siemens SIMATIC NET S7-1200 Specifications

General

Supply voltage	24 V DC
Protection class	IP20
Product type designation	S7-1200
Transfer rate	10/100 Mbit/s
Number of ports	4
Power consumption	2.5 W
Operating temperature	0 °C to 60 °C
Mounting type	DIN rail
Switching capacity	1 Gbps