Hardware manual

5901 High Speed Dialup Modem Hardware Manual

October 19, 2007

5 Operation

The operation of the 5901 modem is configured and controlled using commands or strings of

commands. These commands are sent to the 5901 through the serial communication RS-232 port.

Commands sent to the 5901 are referred to as AT commands. See section 10-AT Command

Guidelines for information on how the AT commands are structured.

The 5901 modem contains a pre-set operating configuration. This configuration is shown as the

default settings in sections 10.2-

AT Command Set to10.10-At@ Command Set.

The pre-set configuration enables the 5901 to operate in most situations but some changes to this

configuration may be required to meet application demands.

The 5901 modem may be operated as a stand-alone modem; as part of a 5000 Series I/O system with

a programmable controller, such as a SCADAPack or TeleSAFE Micro16; and as part of a 5000

Series I/O system with a non-programmable controller, such as a SmartWIRE 5202.

5.1 Stand Alone Modem Operation

When the 5901 modem is used as a stand-alone modem it is directly connected to a Personal

Computer (PC). To configure and control the 5901 modem the PC executes a communication

program, the TelePACE program or a host SCADA program.

5.1.1 5901 Modem Connection to PC

When used as a stand-alone modem the RS-232 serial communication port on the 5901 modem

connects to a serial port on the PC. This connection is referred to as a DTE (PC) to DCE (5901

modem). See the section 4.2.1-5901 Modem Connection to DTE for information on this connection.

5.1.2 Operation using Communication Software

The communication program controls the operation of the 5901 modem by sending configuration

commands, or strings of commands to the modem. These commands are referred to as AT

commands. See section 10.2-AT Command Guidelines for information on how the AT commands

are structured.

The documentation for the communication program used will contain information about how to send

AT commands to the modem.

5.1.3 Operation using TelePACE program

The TelePACE program supports dial up connections to the SCADAPack, TeleSAFE Micro16 and

TeleSAFE 16EX controllers. The TelePACE program controls the operation of the 5901 modem

through the PC Serial Ports Setting dialog box. For complete information about the PC Serial Ports

Setting refer to the TelePACE Ladder Logic User Manual.

To configure the TelePACE program to use the 5901 modem:

 From the Communication menu select PC Serial Port Settings.

 Ensure the settings on the right side of the PC Serial Ports Setting dialog box are correct for

your application. These settings include Port, Protocol, Baud, Parity and Station.

Note: The Port setting is the serial port the PC will use to connect to the 5901 modem.