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eElectro Industries/GaugeTech Doc # E113-7-03-1.18 1-11
1.6: Connecting the Substation Multiplexor Directly to a Computer1.6: Connecting the Substation Multiplexor Directly to a Computer
1. Use an RS232 cable to connect the Substation Multiplexor’s Master Port to an available RS232 port
on the computer.
2. Set the DCE/DTE switch beneath the Master Port to DCE.
3. The Master Port is factory-set to operate at 9600 baud. To configure and communicate with the
Substation Multiplexor, run a standard terminal program on the computer, such as Windows
HyperTerminal. See Chapter 2 for details.
1.7: Connecting to the Substation Multiplexor Using the Internal Modem1.7: Connecting to the Substation Multiplexor Using the Internal Modem
1. Connect a standard telephone cable to the Substation Multiplexor’s Phone Line Jack.
2. Set the DCE/DTE switch beneath the Master Port to DTE.
3. Use a standard terminal program on the computer, such as Windows
®
HyperTerminal, to connect to
the Substation Multiplexor and configure it. See Chapter 2 for details.
4. The Master/Modem Port is factory-set to operate at 9600 baud. You should program the Modem
Baud Rate speed to 38400 for 33.6k Internal Modem or 57600 for 56k Internal Modem after you
have connected. See Chapter 2, section 2.8 for details.
1.8: Connecting to the Substation Multiplexor Using an External Modem1.8: Connecting to the Substation Multiplexor Using an External Modem
1. Before installing the external modem, you must program the Substation Multiplexor to use the
modem string specific to the type of external modem. To do this, first establish a direct connection
between the Multiplexor and a computer, as detailed in section 1.6 above.
2. Run a standard terminal program on the computer, such as Windows
®
HyperTerminal, to connect to
the Substation Multiplexor and configure it. See Chapter 2 for details.
• Use the HU command to make sure the Multiplexor is set for an external modem. If it is not, use
the MC command to change it (sections 2.8 and 2.9).
• Use the MS command to enter the correct modem string for the external modem (section 2.8).
• Use the MB command to set the Modem Baud rate to 57600 (section 2.8).
3. Reset the Substation Multiplexor using the R command (section 2.11).
4. Turn off the Substation Multiplexor.
5. Connect the external modem to the the Multiplexor’s RS232 Master Port. Set the switch beneath the
port to DTE. Power up the external modem.