MODEM COMMUNICATION TO ABB RELAYS
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Figure 39. Remote Modem Settings
As described in for the local modem, the following dipswitches could be configured for power-up auto-
configuration:
Dipswitch Positions are:
POSITION 1 –UP = DTR Always ON
POSITION 2 –UP = VERBAL RESULTS CODE
POSITION 3 –UP = SUPPRESS RESULTS CODE
POSITION 4 –DOWN = NO ECHO OFFLINE COMMANDS
POSITION 5 –UP = AUTO ANSWER ON RING
POSITION 6 –DOWN = CARRIER DETECT OVERRIDE
POSITION 7 –DOWN = INHIBIT DISPLAY NORMAL RESULTS CODE
POSITION 8 –DOWN = ENABLE AT COMMAND SET *** (see note that follows)
POSITION 9 –UP = NO DISCONNECT WITH +++
POSITION 10 –UP = LOAD NVRAM DEFAULTS
***NOTE 1– Once configuration is complete it may be advisable to place dipswitch 8 in the UP position to
disable AT commands. In this way if an “AT” command string is contained within the modem upload or
download file strings or ASCII command strings, the modem will not respond unpredictable or disrupt
communications.
NOTE 2: The modem has a reference key etched on the underside of the device. OFF is denoted as the
down dipswitch position. ON is denoted as the DOWN dipswitch position.
Step 6: Connection and Execution of Attachment Procedure
Attach the modem to analog lines (local and remote). Use the ATDT command string to access the
modem as illustrated in Figure 40 using HYPERTERMINAL. Since the command echo is not suppressed
for the local modem, the example screen in Figure 40 shows the RING and CONNECT prompts returned
upon successful communication.
Summary of Contents for REL 356
Page 23: ...ABB REL 356 Current Differential Protection 1 10 Product Overview and Specifications ...
Page 83: ...ABB REL 356 Current Differential Protection 3 36 Settings and Application ...
Page 127: ...ABB REL 356 Current Differential Protection 5 28 Testing ...
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