2 PROFINET IO in SIPROTEC
2.3 Data-Type Definitions for IO Data Exchange
21SIPROTEC 4, Communication Module PROFINET IO, Communication Profile
C53000-L1840-C360-1, Edition 08.2012
2.3 Data-Type Definitions for IO Data Exchange
The following data types and definitions are used to exchange data between the IO device and IO controller
via PROFINET IO:
• Single-point indication
• Single command
• Double-point indication and double command
• Measured value and statistic value
• Metered value
• Message block for event list and process alarm
• Units and unit multiples
2.3.1 Data Type Single-Point Indication (SP, Input)
Number of byte values: 1/8 (1 bit)
Range of values:
0 = OFF
1 = ON
Figure 2-5 Data Type: Single-Point Indication
Status of Indications
The status (valid or invalid) is relevant for indications which are, for example, received in the SIPROTEC device
with a GOOSE telegram and subsequently read by the IO controller via PROFINET IO.
A single-point indication containing the status of an indication can be created with CFC (Continuous Function
Chart) in DIGSI using the SI_GET_STATUS function block. This second indication can be used in addition to
the value for the transmission via PROFINET IO.
2
0
2
7
to 2
4
2
3
2
2
2
1
...
Bit x+2 Bit xBit x+1Bit x+3
SP 1SP 2
8 single-point indications max. per byte
SP 4 SP 3
... ...
com_profinet-io_profile_us.book Page 21 Friday, August 17, 2012 1:40 PM
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