Interface Description
IGSS offers a TCP/IP interface for third party TCP/IP servers. The communication driver uses a standard Ethernet or Token Ring interface board in the PC together with Windows’ TCP/IP protocol stack to access a remote TCP/IP server. The driver also supports PPP on Direct Line or Dial Up lines through the standard serial RS-232C port.
The IGSS system polls the TCP/IP server cyclically according to one of four user-defined intervals. The time intervals are configurable from 100 milliseconds to 999 seconds. The system automatically groups process data in data blocks – thus fully exploiting the communication link in relation to the present configuration. The driver also supports unsolicited events from the server.
TCP/IP Message Format
message length 32 bit
opcode 32 bit
node 32 bit
data group 32 bit
word offset 32 bit
data 0 16 bit
……….
data n 16 bit
Message length: total length of message including header.
Opcode: 0.
Node: configurable.
Data group: 0: Byte, 1: Word, 2: Dword, 3: Float.
Word offset: zero based offset for start of reading and writing.
Click here to download a pdf document containing technical documentation of the message structure.
Technical Data
| Electrical Interface | : | Standard Ethernet and Token Ring. RS-232C. |
| Protocol | : | TCP/IP V4 |
| Types of data | : | BYTE, WORD and DWORD |
| PLC types supported | : | All programmable devices with a TCP/IP interface |
| Supported platforms | : | Windows Vista, Windows XP, Windows 2003 Server, Windows 2000 |
| Max. telegram size | : | 255 data words |
| Max. number of channels | : | Up to 8 connections are supported |
| Max. number of nodes | : | 32 |
| PC hardware requirements | : | Standard PC Ethernet / Token Ring board or RS-232C interface |
| PC software requirements | : | Standard Microsoft Windows TCP/IP protocol stack |