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EM1500 Configuration
5.1.9 Closing Tab
A serial port can close for a variety of reasons. The “Closing” tab dialog box is where you may control the
parameters that affect this action. All of the serial ports have “Close delay” and “Reopen delay” in com-
mon. The differences lie in the “Close when” choices.
Figure 5.11 Closing Tab
Close when
When to close a connection. The choices are:
DSR dropped
Close when DSR line is dropped. Available with SER1 and SER3 configured as a
9-wire port.
“DTR dropped” is available on SER2.
Both DSR and DTR are used by attached serial devices to indicate that they are
ready.
Modem control, not close on DSR drop
When DSR/DTR line is dropped, escape to modem control mode. This only works
if modem emulation is selected for the serial port. Instead of closing the connec-
tion, the modem goes from data mode to control mode. Control mode is also
entered on receipt of the escape sequence, +++.
Available with SER1 and SER3 configured as a 9-wire port.
“Modem control, not close on DTR drop” is available on SER2.
DCD dropped
Close when DCD (RLSD) line is dropped. Available with SER1 or SER3 config-
ured as a 9-wire port.
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