Cycle Times - Siemens SIMATIC NET CP 443-1 Advanced Manual

Performance data
2.6 Characteristic data for PROFINET CBA
Characteristic
Access to S7extended variables
Maximum number of S7 connections
for access to variables with the
PROFINET attribute "s7extended".
Note: The PROFINET attribute
"s7extended" is used only by OPC
applications over the OPC server;
variables with this attribute can only
be used with OPC applications.
*)The maximum size of an output property is 8191 bytes. 1 byte Lifestate must be added to this. This adds up to a total of
8192 bytes.
The same applies to an input property since this is interconnected with an output property of the same size. The maximum
data length of 8192 bytes also applies to the sum of several input properties, for example in the case of a byte array
(8191 bytes + 1 byte Lifestate).
**) The value is not checked by iMap.
Note
Data length and data type in PROFINET CBA
You will find information about the data length and data type in PROFINET CBA
communication in the online help of SIMATIC iMap and in the manuals for PROFINET CBA.
See section On project engineering of PROFINET CBA (Page 122) for information on this.
Note
Effects of a large configuration or parallel operation
With a large configuration or when using other services at the same time (for example online
monitoring), the configured scanning frequency (with acyclic interconnections) or the
transmission frequency (with cyclic interconnections) cannot be guaranteed in all cases. To
remedy this, we recommend that you increase the relevant values.
2.6.2

Cycle times

Communication load and extension of the cycle
When using the CP 4431 Advanced, there is little influence by PROFINET CBA on the cycle
time of OB1. The influence does not depend on the number of PROFINET CBA partners or
on the number of PROFINET CBA interconnections.
32
Typical value
16
(not checked by iMap)
mum number of connections according to sec-
Limit value
with FB88
32 maximum
Note: You should also keep in mind the maxi-
tion 7.3
CP 443-1 Advanced (GX30)
Manual, 03/2019, C79000-G8976-C256-05
with FB90