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10.2
Acyclic data exchange
10.2.1
Acyclic data exchange - Overview
Addressing
S7 has system function blocks for writing / reading this data. The following data is transferred
for addressing:
Index
ID
Length
Note
The following applies for PROFIBUS DP:
The following data sets can be used via the C1 channel only, depending on the application.
Acyclic data for HCS
We distinguish between two types of acyclic data for HCS:
● Acyclic output/input data which relate to the overall functionality and therefore address
the HCS. This data applies to the entire HCS.
● Acyclic output/input data which relate to only one module and therefore only address one
module. This data applies to one function of the module.
Addressing is described for the individual data sets.
SIPLUS HCS4300 PROFINET/PROFIBUS DP
Operating Instructions, 10/2019, A5E35452705A/005
Dataset number
TIA: Hardware identification of the hardware module (DP/PROFINET IO)
•
STEP 7 classic: Logical address of the PROFINET IO component / DP slave
•
component (module)
When writing: Length of the data in the dataset
•
When reading: Maximum number of data items that can be received.
•
Communications
10.2 Acyclic data exchange
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