Configuration
4.18 Data points
CP 1243-8 IRC
128 Operating Instructions, 02/2018, C79000-G8976-C385-03
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Destination subscriber properties
The parameter group relates to the destination subscriber that was configured as the
endpoint of the connection.
–
General request supervision time
This is the maximum time that may be required by a destination subscriber
(communication module capable of ST7) to respond fully to a general request (GR).
If the GR response has not arrived completely at the requesting partner when the
supervision time has expired, a message is entered in the diagnostics buffer of the
module.
The general request supervision time is 900 seconds.
–
Frames to destination subscriber with time stamp
Regardless of the configuration all frames are sent to the destination subscriber with a
time stamp.
Data point configuration
Data point-related communication with the CPU
No program blocks need to be programmed for telecontrol modules with data point
configuration to transfer user data between the station and communications partner.
The data areas in the memory of the CPU intended for communication with the
communications partner are configured data point-related on the module. Each data point is
linked to a PLC tag or the tag of a data block.
Requirement: Created PLC tags and/or data blocks (DBs)
PLC tags or DBs must first be created on the CPU to allow configuration of the data points.
The PLC tags for data point configuration can be created in the standard tag table or in a
user-defined tag table. All PLC tags intended to be used for data point configuration must
have the attribute "Visible in HMI".
Address areas of the PLC tags are input, output or bit memory areas on the CPU.
Note
Number of PLC tags
Remember the maximum possible number of PLC tags the can be used for data point
configuration in the section
Performance data and configuration limits (Page 22).
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