IGSS32 offers a serial interface for the Mitsubishi Melsec A/AnS type PLC equipment. The Melsec-A communications protocol enables Mitsubishi PLCs to communicate with external devices such as computers running IGSS32, printers, CRTs etc using RS-232C and RS-422 serial interfaces.
An AJ71C24 or compatible interface board must be installed in the Melsec-A/AnS PLCs in order make a point-to-point connection. The point-to-point connection can be extended to a multidrop network by connecting two or more PLCs.
The communication interface supports both direct and dialled-up connections.
The IGSS32 system polls the PLC equipment cyclically according to one of four user-defined time 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 the communication link in relation to the present configuration.
NOTE: The IGSS32 serial interface driver is compatible with the TCP/IP based Ethernet driver for Mitsubishi Melsec-A/AnS PLCs. This means that no changes has to be made.
|Protocol||:||Mitsubishi Melsec-A format 1 protocol|
|Types of data||:||String, Fixed point 8, 16, 32, BCD 16, 32.|
|PLC types supported||:||All Mitsubishi PLCs types supporting the AJ71C24 (or compatible) interface board. E.g. A1-, A2-, A3-, AnS etc. type CPUs.|
|Addressing||:||Node (PLC), data type (D, R, T, C and expanded D areas), Area index, bit offset (a whole number of words is read or written)|
|Supported platforms||:||Windows Vista, Windows XP, Windows 2003 Server, Windows 2000 .|
|Max. telegram size||:||Up to 512 bytes pr. Telegram depending of capacity of AJ71C24 or compatible module.|
|Transmission speed||:||Up to 115Kbaud depending on the AJ71C24 (or compatible module) port speed.|
|Throughput||:||Up til 4 telegrams pr. Channel pr. Second (depending on available bandwidth).|
|Max. number of channels||:||Up to 8 COM ports are supported concurrently.|
|Max. number of nodes||:||32 pr. COM port|
|PC hardware requirements||:||1-8 standard serial ports (COM ports). Standard modem(s) if dialled-up is used.|
|PC software requirements||:||None|