Siemens CP 1243-1 PCC Operating Instructions Manual page 14

Application and properties
1.5 Configuration limits and performance data
Number of data points for the data point configuration
The maximum number of configurable data points is 200.
User data
The data to be transferred by the CP is assigned to various data points in the STEP 7
configuration.
The size of the user data per data point depends on the data type of the relevant data point.
You will find details in the section Datapoint types (Page 33).
Frame memory (send buffer)
The CP has a frame memory (send buffer) for the values of data points configured as an
event.
The send buffer has a maximum size of 64 000 events divided into equal parts for all
configured communications partners. The size of the frame memory can be set in STEP 7,
refer to the section Communication with the CPU (Page 47).
You will find details of how the send buffer works (storing and sending events) as well as the
options for transferring data in the section Types of transmission, event classes, triggers,
status identifiers (Page 36).
Firewall rules
The maximum number of firewall rules in advanced firewall mode is limited to 256.
The firewall rules are divided up as follows:
● Maximum 226 rules with individual addresses
● Maximum 30 rules with address ranges or network addresses
(e.g. 140.90.120.1 - 140.90.120.20 or 140.90.120.0/16)
● Maximum 128 rules with limitation of the transmission speed ("Bandwidth limitation")
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Operating Instructions, 02/2015, C79000-G8976-C384-01
CP 1243-1 PCC