System information

General Reference Guide IO Servers Configuration
RG-001-0-EN ver 1.5 eWON® - 20/03/2009 - ©ACT'L sa Page 135
5.14 HITACHI IO Server
5.14.1 Introduction
The Hitachi IOServer allows the eWON to poll tags belonging to a HITACHI EH series PLC using its serial link or Ethernet interface.
eWON uses standard H protocol (for serial RS232), station number H protocol (for serial RS485), and Ethernet H-protocol (for Ethernet).
No remote maintenance functionality is provided by this IO server.
5.14.1.1 Setup
5.14.1.1.1 COM configuration
Figure 104: HITACHI IOServer: COM setup
The eWON implements Transmission Control Procedure 1 (One way activation Control Procedure).
When half-duplex mode is used (RS485), the eWON acts as master. So, no other master may be on the bus (eg: control panel or host).
Parameter Description
Baud Rate
Speed of the Serial port.
Available speeds are 1200, 2400, 4800, 9600, 19200 Bauds or disabled
Parity The parity to apply (None / Even / Odd)
Databits The number of bits in data (7 or 8)
Stop bit(s) The number of Stop bits (1 or 2)
HW mode
Choose the Hardware mode of communication:
• Ful Duplex HW handshaking (by default)
• Full Duplex NO handshaking
• Half duplex
Reply Timeout Maximum time the eWON will wait for a valid message response
Table 112: HITACHI IOServer: COM parameters