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MERLIN LEGEND Communications System Release 6.0
System Programming
555-660-111
Issue 1
February 1998
Programming with SPM
Page 2-16Accessing SPM
2
Figure 2–4. Remote Modem Connection
NOTE:NOTE:NOTE:
Remote access (modem connection) has priority over local access (direct
connection), unless a backup or restore procedure is in progress through a
direct local connection. If a modem connection is attempted while any other
type of on-site programming is in progress (either at the system or at a
directly-connected PC), the system sends a message to the on-site
programmer. The message indicates that a modem connection is being
established and the on-site programming session is terminated.
Accessing SPM 2
The procedure for accessing SPM depends on whether your PC is connected to
the control unit with a modem (either local or remote) or without a modem (direct).
This section covers both of these access procedures.
With a Direct Local Connection 2
To access SPM when your PC is connected directly to the control unit, follow the
steps below.
CAUTION
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1
2
PROCESSOR
RS-232
Serial
Communications
Port
Incoming
trunk line
Public or private
telephone network
MODEM