User guide

eWON 500-2001-4001-4002 User Guide - IO Servers Configuration
eWON 500®2001®4001®4002® Version 4_3_0 - User Guide - 10/5/05 - ©ACT'L sa - Page 101
6.8 S5-AS511 IO Server
6.8.1 Introduction
This IO server is intended for use with Siemens S5 PLCs communicating via the front programming port using AS511 protocol.
The AS511 protocol is specific for each Siemens device. This IO Server has been designed to operate with a set range for Siemens equipment.
Use of the IO Server on devices other than those listed is not recommended and not supported.
The Siemens S5 PLC family has a unique memory structure. Data within the PLC are not located at fixed locations within the PLC's memory
space. This memory space is continuously updated and revised as you create and modify your PLC logic. When these revisions occur the
location of key data elements such as flags, timers, counters, I/O, and data blocks can move around in the PLC's memory. The Siemens S5 IO
Server has been designed to read the location of these memory elements when the driver first begins operation upon detecting a communication
error or after a request (which is not a read or write request) has been transmitted to the PLC. If you change your PLC configuration you must
restart the Siemens S5 IO Server or simply unplug/re plug the cable connection. Both of these actions will cause the Siemens S5 IO Server to
reacquire the location of all PLC memory elements.
6.8.2 Setup
Figure 57: S5-AS511 IO server setup window