Siemens S7-200PLC Bedienungsanleitung PDF herunterladen (Seite 10)

Chapter

5.2 Step 2 - Linking the PLC with the eWON

5.2.1 Introduction

The eWON can be connected to the PLC either using a serial connection supporting PPI, an MPI

connection supporting PPI or an Ethernet connection supporting ISOTCP. The eWON can be

connected to PLCs both in PPI and ISOTCP simultaneously.

5.2.2 PPI link

1. Link the PLC with the eWON using one of the Siemens standard PPI cables or equivalent

described in § 9 Appendix 2 – PPI cables.

2. Make sure the position of the dip switches is OK:

eWON with serial-port: positions have to be for RS422, RS485-link

Dip switch positions Serial mode

RS422, RS485

without polarization and termination resistors

RS422, RS485

with polarization (680 Ω) and termination (120 Ω) resistors

eWON with MPI-port: this device has no dip switches

Polling Data Registers from Siemens S7-200 PLC Series (How to) Page 10/21

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Siemens S7-200PLC Bedienungsanleitung Seite 10