The adapter is a microcontroller that provides data exchange between the electronic corrector, on the one hand, and a personal computer or printer, on the other.
A personal computer can be connected through a modem.
The adapters support the Modbus RTU network protocol and can network computers and any other devices that support the same protocol (computer, printer, etc.). The total number of networked devices shall not exceed 32.
A network with Modbus RTU protocol has one master device (adapter) and one or more slaves. One or two devices can be connected to the main adapter: a computer (directly or through a modem) and a printer. The connected computer reqiures the appropriate software.
The networking of computers allows:
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printing information from the networked electronic correctors via the ASP1 adapter to a network printer, when connecting a network printer;
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extracting information from any of the networked electronic correctors via a telephone line to a remote IBM-compatible computer, when connecting a HAES-compatible modem (hereinafter referred to as the modem);
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configuring, testing and monitoring the information network, when connecting an IBM-PC-compatible personal computer (hereinafter referred to as the computer) (one free COM port is required); centralized monitoring, removal of archives and tuning information, maintaining a database of settings, archives, intervention log and other information on the networked computer.
Adapters are connected using the master-slave principle, where only one device (master) can initiate a transfer (initiate requests). Other devices (slaves) transmit the data requested by the master or perform the requested actions.
The master adapter can be addressed to an individual slave, or it can initiate a broadcast message to all slaves. The slave device returns a message in response to a request addressed to it. Information is exchanged in blocks.
Input signals and external interface parameters
The Irga-2 electronic corrector is connected to the adapter through the RS-232 connector and a standard COM-port cable. The adapter enables data exchange with the computer via the RS-232 interface at a speed of 9,600 bps.
The printer is connected to the main adapter via the ASP1 connector and an optional ASP1 print adapter, which has an LPT port output. The ASP1 adapter allows printing directly on a wired printer.
The modem is connected to the main adapter via the RS-232 connector and the cable that is included with the modem. The adapter enables data exchange with the modem via the RS-232 interface at a speed of 9,600 bps.
The computer is connected to the main adapter via the RS-232 connector (RS-232 interface) and a cable for the COM port and supports communication at speeds up to 115,200 bps.
The adapter is connected to a network using the RS-485 physical interface via terminals 5, 6, 7 (Appendix B of the AS-485 Adapter Operating Manual).
The adapter must be grounded when working with a three-wire communication line.
The adapter has terminals for connecting terminating resistors according to the RS-485 specification and has a switch for turning on the internal terminal resistor.