Lenze Drive Server Bus server S7 getting started Manuel d'utilisateur télécharger pdf (Page 38)

Busserv er S7

99Busserver S7 DE/EN 1.0

Output parameters:

• Global Drive Control (GDC) and DriveServer were used to l oad a complete parameter set.

• An S7-315 (cycle time: 15 ms) and an S7-412 (cycle time: 2 ms) were used as PLC.

• PROFIBUS was set to 1.5 Mbit/s.

• Different interface modules were used.

• MPI baud rate: 187.5 Kbaud

• Baud rate of the serial i nterface for PC ada pter connection: 38.4 Kbaud

Transfer times detected for one parameter set:

PLC Interface module

Type Connection Controller PC-PLC connection Transfer time

S7-315

PROFIBUS on the CPU 82xx vector CP5511 (187.5 Kbaud) 44 s

CP342-5 82xx vector CP5511 (187.5 Kbaud) 54 s

PROFIBUS on the CPU 93xx CP5511 (187.5 Kbaud) 107 s

CP342-5 82xx vector 60 s 64 s

S7-412 PROFIBUS on the CPU

82xx vector (FIF) CP5511 12 s

82xx vector (AIF) CP5511 13 s

82xx vector (FIF) PC adapter 24 s

82xx vector (FIF) Ethernet 11 s

93xx CP5511 30 s

93xx PC adapter 56 s

93xx Ethernet 28 s

Summary:

• The transfer time mainly depends on the cycle time of the PLC.

The longer the cycle time, the lower the influenc e of the bus rates.

• A fast connection between PC and PLC accelerates data transfer. Yet, the cycle time remains

the limiting factor.

• Some CPU cards permit the baud rate of the MPI bus to be set to up to 12 Mbit/s. If technology

allows, this increase in speed should be taken advantage of.

• However, the PROFIBUS transfer rate only has a minor influence on the transfer time of a

parameter set.

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Lenze Drive Server Bus server S7 getting started Manuel d'utilisateur Page 38