1MRS119000 1MRS 750577-MUM EN Issued 98-06-02 Plug-in Modem Version A Checked MKa Approved OV Data subject to change without notice Contents 1.0 General ......................4 1.1 Introduction ..................4 1.2 Type marking ..................5 1.3 Features ....................5 1.4 Technical specifications ................. 6 1.4.1 LED indicator functions ..............
General Introduction The 1MRS119000 modem board is a multifunctional plug-in modem board which can be used together with several distribution automation products of ABB Transmit Oy. Via the local public telephone network or leased lines the modem provides data communication at up to 14400 bps.
The type marking of the modem consists of a type number, a temperature range code and a country code. The type number is 1MRS119000-_ _ _. The one-letter temperature range code and the two-letter country code specify the service temperature range and the desti- nation country where the modem is to be installed.
Technical specifications 1.4.1 LED indicator functions Total 7 LEDs: Modem connected to line (off hook), Green connected to line relay control signals RNG Indicates a true ringing signal Green TXD Transmitted data. Connected to the modem TxD signal Green RXD Received data. Connected to the modem RxD signal. Green Carrier detect.
Power supply and booting The plug-in modem board is an optional unit for ABB Transmit Oy protection and con- trol products. The modem is powered by the equipment it is used in and does not need a separate external power supply.
Installation and connection Introduction The installation of the 1MRS119000 consists mainly of making the physical connections between the modem and the telephone network, leased line, fixed lines or radio equip- ment. The power supply connection and the connection for data transfer to and from the microcontroller (protective relay, I/O unit) are made after the modem board has been properly inserted.
Connectors All connectors are directly mounted on the modem board. The connector name, type of connectors and their functions are as follows: Connector Type Function 64-pin Euro power supply 9-pin D-connector RS 232 serial interface Xn.1 RJ12 public telephone network Xn.2 9-pin D-connector RS 232 serial interface...
The 1MRS119000 modem is designed for use over a 2-wire or 4-wire leased line. No special line conditions are needed and the operation is full-duplex. The leased lines can be connected to the phone line interface connector (Xn.1, see previous section) or to the...
DTE connection During commissioning, all settings to the modem board 1MRS119000 are made using a DTE (terminal or Personal Computer running e.g. a terminal emulation program). The DTE is to be connected to the 9-pin female connector Xn.2 via a standard RS 232 cable. If you use your own cable, always check that the cable matches the pin configuration of the modem board and DTE.
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AT commands are the means by which the modem is configured. The available commands enable reading and modifying of the modem parameters. This chapter describes the AT commands recognized by the 1MRS119000 modem board. The sections of this chapter describe the command syntax and give a detailed description of the available AT com- mands and S registers.
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3.3.3 AT Command Format A command line is a string of characters sent from a DTE to the modem (DCE) while the modem is in a command state. A command line has a prefix, a body, and a terminator. Each command line (with the exception of the A/ command) must begin with the charac- ter sequence AT and must be terminated by a carriage return.
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AT Commands The modem will respond to the commands detailed below. Parameters applicable to each command are listed with the command description. The defaults shown for each configu- ration command are those used in the Rockwell factory profile. A/ - Re-execute Command The modem behaves as though the last command line had been re-sent by the DTE.
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Cn - Carrier Control This command is included for compatibility only, and has no effect other than returning a result code. The only valid parameter is 1. Result Codes: n = 1. ERROR Otherwise. Dn - Dial This command directs the modem to go on-line, dial according to the string entered and attempt to establish a connection.
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& Wait for credit card dialling tone before continuing with the dial string. If bong is not detected within the time specified by S6, the modem will abort the rest of the sequence, return on-hook, and generate an error message. Dial pause: the modem will pause for a time specified by S8 before dialling the digits following ",".
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Fn - Select Line Modulation This command selects the line modulation according to the parameter supplied. The line modulation is fixed unless Automode is selected. This command interacts with the S37 and the N command. The parameter value, if valid, is written to S37 bits 0-4. To select line modulation, it is recommended that either the F command, or a combination of the S37 and the N command, be used, but not both.