Siemens SIMATIC NET CP 343-1 Manuel d'utilisateur télécharger pdf (Page 37)

5 Performance Data / Operation

B−37

CP 343-1 Advancedfor Industrial Ethernet / Manual Part B

Release 06/2008

C79000-G8976-C202-04

Table 5-9 Characteristic data for PROFINET CBA communication, Fortsetzung

Characteristic Limit valueTypical value

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.

(not checked by iMap)

32 maximum

Note: You should also

keep in mind the

maximum number of

connections according

to Section 7.3

*) The value is not checked by iMap.

Note

For information on the data length and data type in PROFINET CBA

communication, refer to the online help on SIMATIC iMap, the “Creating

PROFINET Components” manual and the “Configuring Plants with SIMATIC iMap”

manual.

Reaction times for PROFINET CBA

The achievable reaction times for PROFINET CBA communication depend on the

following factors:

S Type of interconnection (cyclic or acyclic) and the transmission frequency or

scanning frequency

S Configuration limits on the component interface (interface DB of the PROFINET

CBA function block (FB88))

1 2 ... 32 33 34 35 36 37 38 39 40 41 42 ... 79 80

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Siemens SIMATIC NET CP 343-1 Manuel d'utilisateur Page 37