Siemens CP 1243-1 Operating Instructions Manual page 92

Configuration
4.10 Data points
Configuration of the mirroring back for output events (object groups 11 and 42)
You first create the data point types Binary Output Event (object group 11) and Analog
Output Event (object group 42) as described above as data points of the object groups 12 or
41.
The local values of these two object groups can be monitored for change and the changes
transferred to the master (). Changing a local value can, for example, be caused by manual
operator input on site.
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. You configure this mirroring
back function is configured using the "Value monitoring" option in data point configuration,
General tab.
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.
Format of the time stamp
Time stamps are transferred in UTC format (48 bits) and contain milliseconds.
Data point types of the "IEC" protocol
Table 4- 3 Supported data point types, IEC types and compatible S7 data types
Format (memory Data point type
requirements)
Bit Single-point information
Single-point information with time tag
CP56Time2a
Single command
Single command with time tag
CP56Time2a
Double command with time tag
CP56Time2a
Byte Step position information
Step position information with time
tag CP56Time2a
Regulating step command with time
tag CP56Time2a
Integer (16 bits) Measured value, normalized value
Measured value, normalized value
with time tag CP56Time2a
Measured value, scaled value
Measured value, scaled value with
time tag CP56Time2a
Set point command, normalised
value
Set point command, scaled value
Set point command, normalised
value with time tag CP56Time2a
Set point command, scaled value
with time tag CP56Time2a
92
1)
1)
1)
1)
1)
1)
1)
1)
1)
IEC type Direction S7 data types
<1> in Bool
<30> in Bool
<45> out Bool
<58> out Bool
<59> out Bool
<5> in Byte, USInt
<32> in Byte, USInt
<60> out Byte, USInt
<9> in Int
<34> in Int
<11> in Int
<35> in Int
<48> out Int
<49> out Int
<61> out Int
<62> out Int
Operating Instructions, 04/2017, C79000-G8976-C365-03
Operand area
I, Q, M, DB
I, Q, M, DB
Q, M, DB
Q, M, DB
Q, M, DB
I, Q, M, DB
I, Q, M, DB
Q, M, DB
I, Q, M, DB
I, Q, M, DB
I, Q, M, DB
I, Q, M, DB
Q, M, DB
Q, M, DB
Q, M, DB
Q, M, DB
CP 1243-1