Siemens S7-200PLC Bedienungsanleitung PDF herunterladen (Seite 4)

Hardware requirements

Chapter 2.

The eWON features the S7200 IO Server that is dedicated to the S7-200 Series PLCs from

Siemens. Since firmware 5.7, all eWON types, with serial port and with MPI port, are suited to

communicate in both PPI modes (MonoMaster and MultiMaster). The standard serial port of the

eWON must be configured in RS-485 (with the dipswitches) to communicate in PPI.

The ISOTCP (Ethernet) is available on all the eWON types.

The eWON always acts as MASTER.

Usage eWON with SERIAL port

(EWxxx0x)

eWON with MPI port

(EWxxx6x)

MonoMaster

eWON is the ONLY Master on the PPI

network.

Yes

since firmware 5.5

MultiMaster

eWON is not the only Master on the PPI

network. Other masters (HMI or PPI

multimaster programming cables) may be

present at the same time on the PPI bus.

Yes

since firmware 5.7

Yes

since firmware 5.5

Note: For MultiMaster use, an eWON with MPI is probably the best choice because it has higher

performances to manage multi thread communication.

Polling Data Registers from Siemens S7-200 PLC Series (How to) Page 4/21

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