Configuration
4.18 Data points
CP 1243-8 IRC
Operating Instructions, 02/2018, C79000-G8976-C385-03
135
4.18.2
Syntax of the data point names
Character set for data point names
When you create a data point, a preset name "DataPoint_n" is adopted. In the data point
table and in the "General" tab of the data point you can change the name of the data point.
When assigning names only ASCII characters from the band 0x20 ... 0x7e (no. 32-126) may
be used with the exceptions listed below.
Forbidden characters:
●
. ' [ ] / \ |
period, apostrophe, square brackets, slash, back slash, vertical line (pipe)
4.18.3
Datapoint types
Configure the user data to be transferred from the CP that is referenced via PLC tags of the
CPU on the CP as data points.
The data point types supported by the CP along with the compatible S7 data types are listed
below for the various telecontrol protocols.
Note
Effect of the change of arrays for data points
If an array is modified later, the data point must be recreated.
Data point types of the "ST7" protocol
The direction of the data transfer is specified in the "Data point type" column:
●
Monitoring direction
The objects (right column) for the monitoring direction have the abbreviation "_S".
●
Control direction
The objects (right column) for the control direction have the abbreviation "_R".
Table 4- 2
Supported data point types and compatible S7 data types
Format (memory
requirements)
Data point type
S7 data type
Operand area Number of data
points per object
Object
Bit
Digital input
Bool
I, Q, M, DB
8
Bin08X_S
Digital output
Bool
Q, M, DB
8
Bin08X_R
Byte
Digital input
Byte, USInt
I, Q, M, DB
4
Bin04B_S
Digital output
Byte, USInt
Q, M, DB
4
Bin04B_R
Command output
Byte, USInt
Q, M, DB
1
Cmd01B_R
Command input
1)
Byte, USInt
I, Q, M, DB
1
Cmd01B_S
1)
