54
EM1500 Configuration
5.1.7 Polling Tab
This is an advanced setting that is only visible when
View | Advanced
is checked. The same polling
options are available on all 5 serial ports.
1
1
1
C
D
SER3 9-wire RS232, true 3-wire (RTS,
CTS, DSR, DTR, DCD, RI are 0-3V, Tx,
Rx are +/-5V)
SER4 is internal modem
1
1
0
C
E
SER3 9-wire TTL
SER4 is internal modem
1. “x” means don’t care;
“0” means the configuration parameter is unchecked;
“1” means the configuration parameter is checked.
2. JP3 is an internal jumper setting:
A means JP3 is jumpered on 1-3 and 2-4, i.e., SER4 is RS232 on 10-pin,
B means 3-5 and 4-6, i.e., SER4 is TTL on 10-pin
C means 7-9 and 8-10, i.e., internal modem installed (future option), use PD4/5 on 10 pin for
CTS/RTS
3. JP2 is internal jumper setting:
D means JP2 is jumpered on 1-3 and 2-4 i.e. SER3 is RS232
E means 3-5 and 4-6 i.e. SER3 is TTL)
4. 3-wire means just Tx, Rx
5-wire means Tx, Rx, CTS and RTS
9-wire means Tx, Rx, CTS, RTS, DSR, DTR, DCD, RI.
Prefixed with “true,” means that all N-wire signals are true RS232 levels. Without the “true”
the port may be used in controlled conditions with N-wire RS232 equipment, but is not guar-
anteed to work since not all of the N wires are at correct standard levels.
Table 5.2 Modem Tab Configuration Options for SER3 and SER4
SER3 uses
9-wire
control
1
SER4 is
internal
modem
1
RS232
levels
1
JP3
2
JP2
3
Comment
4
Содержание EM1500
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