System information

General Reference Guide IO Servers Configuration
RG-001-0-EN ver 1.5 eWON® - 20/03/2009 - ©ACT'L sa Page 110
5.8 S5-AS511 IO Server
5.8.1 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 a 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 connection cable. Both actions will cause the Siemens S5 IO Server to reacquire
the location of all PLC memory elements.
5.8.2 Setup
Figure 86: S5-AS511 IO server setup window
5.8.3 Communication setup
The AS511 link uses a RS-232 Current Loop functioning mode.
A specific cable (with electronic) is therefore required (Siemens S5 Cable : ACT’L ref EW40910)
The communication parameters are fixed to the following values:
• 9600 Baud (Fixed)
• Even Parity (Fixed)
• 8 Data Bits (Fixed)
• 1 Stop Bit (Fixed)
• Full duplex no handshaking (Fixed)
5.8.3.1 Supported Devices
• Siemens S5 - 90U
• Siemens S5 - 95U
• Siemens S5 - 100U - 100
• Siemens S5 - 100U - 101
• Siemens S5 - 100U - 103
• Siemens S5 - 101U
• Siemens S5 - 115U - 941
• Siemens S5 - 115U - 942
• Siemens S5 - 115U - 943
• Siemens S5 - 115U - 944
• Siemens S5 - 115U - 945
Table 86: Siemens S5 devices supported by the eWON AS-511 IO server