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CHAPTER 4: COMMUNICATION INSTALLATION
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EPM 5000 series Advanced Power Meters GE Multilin
Y
OU MAY WANT TO USE A MODEM MANAGER RS485-RS232 CONVERTER
When speaking to most RS-485 or RS-232C based devices, the remote modem must be programmed for
the communication to work. This task is often quite complicated because modems are quirky when talking
to remote devices. To make this task easier, EIG has designed a Modem Manager RS-485 to RS-232C
converter. This device automatically programs the modem to the proper configuration. Also, if you have
poor telephone lines, modem manager acts as a line buffer, making the communication more reliable.
I. MODEM CONNECTED TO COMPUTER (ORIGINATE MODEM)
Programming the Modem
Comply with the modem’s instruction manual and follow these instructions:
R
ESTORE MODEM TO FACTORY SETTINGS:
• This procedure erases all previously programmed settings.
S
ET MODEM TO DISPLAY RESULT CODES:
• The device uses the result codes.
S
ET MODEM TO VERBAL RESULT CODE:
• The device uses the verbal codes.
S
ET MODEM TO IGNORE DTR SIGNAL:
• Necessary for the device to ensure connection with originate modem.
S
ET MODEM TO DISABLE FLOW CONTROL:
• Necessary to communicate with remote modem connected to device.
T
ELL MODEM TO WRITE THE NEW SETTINGS TO ACTIVATE PROFILE:
• Places these settings into nonvolatile memory; the settings take effect after the modem powers up.
II. MODEM CONNECTED TO THE DEVICE (REMOTE MODEM)
Programming the Modem
Comply with the modem’s instruction manual and follow these instructions:
R
ESTORE MODEM TO FACTORY SETTINGS:
• This procedure erases all previously programmed settings.
S
ET MODEM TO AUTO ANSWER ON N RINGS:
• Sets the remote modem to answer the call after n rings.
S
ET THE MODEM TO AUTO NEGOTIATE MODE:
• Sets the remote to auto negotiate to communicate successfully with EPM 5300P and other devices in
the modem.
S
ET MODEM TO RETURN NUMERIC RESULT CODES:
• Increases speed connection with EPM 5300P.
S
ET MODEM TO IGNORE DTR SIGNAL:
• Necessary for device to ensure connection with originate modem.
S
ET MODEM TO DISABLE FLOW CONTROL:
• Necessary to communicate with remote modem connected to EPM 5300P.
T
ELL THE MODEM TO WRITE THE NEW SETTINGS TO ACTIVATE PROFILE:
• Places new settings into nonvolatile memory; settings take effect after the modem powers up.