Configuration
4.18 Data points
CP 1243-8 IRC
136
Operating Instructions, 02/2018, C79000-G8976-C385-03
Format (memory
requirements)
Data point type
S7 data type
Operand area Number of data
points per object
Object
Integer with sign
(16 bits)
Analog input
Int
I, M, DB
4
Ana04W_S
Mean value input
Int
I, M, DB
4
Mean04W_S
Analog output
Int
Q, M, DB
4
Ana04W_R
Mean value output
Int
Q, M, DB
4
Mean04W_R
Setpoint output
2)
Int
Q, M, DB
1
Set01W_R
Setpoint input
1)
Int
I, Q, M, DB
1
Set01W_S
1)
Counter (16 bits) Counter input
UInt, Word
I, Q, M, DB
1
Cnt01D_S
Counter input
UInt, Word
I, Q, M, DB
4
Cnt04D_S
Counter output
1)
UDInt, DWord
Q, M, DB
1
Cnt01D_R
1)
Counter output
1)
UDInt, DWord
Q, M, DB
4
Cnt04D_R
1)
Floating-point
number (32 bits)
Analog input
Real
M, DB
4
Ana04R_S
Analog output
Real
Q, M, DB
4
Ana04R_R
Block of data
(4 .. 48 bytes)
Data input
ARRAY [1...12] of
DInt / UDInt /
DWord / Real
3)
DB
12
Dat12D_S
Data output
DB
12
Dat12D_R
Parameter output
2)
DB
12
Par12D_R
Parameter input
1)
DB
12
Par12D_S
1)
1)
Only ST7-TIM as master station or node station
2)
See below, section "1: Mirroring back"
3)
See below, section "2: Block of data"
Mirroring back
The mirroring back function using the "Value monitoring" parameter can be configured for
the following data point types:
●
Setpoint output
●
Parameter output
The local values of the data points of this type can be monitored for changes and the
changes transferred to the master with the "Value monitoring" function.
A change to a local value can be caused by, for example, manual operator input on site.
To allow the value resulting from local events or interventions to be transferred to the master
station, a mirroring back channel is generated for the relevant data point with the "Value
monitoring" function via which the locally changed value is mirrored back.
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.
Block of data
With the ARRAY data type, blocks of data from contiguous memory areas up to a size of
4 .. 48 bytes can be transferred.
Compatible components of ARRAY are DInt, UDint, DWord or Real. The components within
an array must be of the same type.
Format of the time stamp
For information on the format of the time stamp, see below .
