Application and functions
1.7 Configuration limits and performance data
CP 1542SP-1, CP 1542SP-1 IRC, CP 1543SP-1
18 Operating Instructions, 01/2017, C79000-G8976-C426-03
The size of the send buffer can be configured in STEP 7, refer to the section Communication
with the CPU (Page 56).
The maximum size of the send buffer depends on the telecontrol protocol being used and is
as follows:
● TeleControl Basic
64000 events
● DNP3
100000 events
● IEC 60870-5-104
100000 events
You will find details of how the send buffer works such as storing events as well as the
options for transferring the data in the section Process image, types of transmission, event
classes, triggers (Page 63).
E-mail (via message editor)
Only CP 1542SP-1 IRC
With telecontrol communication enabled, up to 10 messages can be configured in STEP 7.
The messages are sent as e-mails.
Telecontrol connections and data points
Only CP 1542SP-1 IRC
●
– TeleControl Basic
A connection can be established to a single or redundant telecontrol server.
– DNP3
Connections to up to four masters can be established.
– IEC 60870-5-104
Connections to up to four masters can be established.
●
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 59).
The maximum number of configurable data points is 500.
In the allocation of the internal CP memory for data points, the length of the data point
name is also included. See also the note in section Configuring the data points (Page 57).
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