Test Menu – Serial Port - Loop Back Test
With
Serial Port -
Loop Back Test
highlighted, press
ENT [F5] to bring up
the screen shown to
the right. At this
point, either connect
the RS-232 loop back
connector or the
RS-422/485 loop
backconnector,
depending on which
type of
communications
connection is being
used, and press ENT
[F5] to start the test.
If the test is passing,
the
Receive Counts
will equal the
Bytes
Sent
. If the serial port
is not working, then
the
Error Counts
will
equal the
Bytes Sent
.
The
RTS/CTS
signals
will also show either
pass
or
fail
as shown
to the right. The test
will continue until
the BAK [F1] key is
pressed.
1
15
15-pin D-sub
(male)
2
3
TXD
RXD
7
8
CTS
RTS
RS-232 Loop-back Connector
User Constructed
Wiring Diagram
1
15
15-pin D-sub
(male)
7
8
CTS
RTS
9
11
RXD+
TXD+
10
12
RXD
TXD
RS-422/485 Loop-back Connector
User Constructed
Wiring Diagram
BAK
UP
DWN
ENT
ENT
TEST MENU
1 Serial Port1 Loop Back
2 Serial Port2 Loop Back
3 PLC Enquiry Test
4 Buzzer Test
5 Touch Panel Test
BAK
UP
DWN
ENT
ENT
TEST MENU
1 Serial Port Loop Back
2
3
4
Use Loop Back
Connector and
Press ENT
BAK
UP
DWN
ENT
LOOP BACK TEST
ESC
Serial Port
Bytes Sent 124
Rcv Counts 124
Err Counts 0
RTS/CTS pass
®
5
Chapter 5: System Setup Screens
5–14
EA1-TCL-M Hardware User Manual, 1st Ed., 12/09
BAK
UP
DWN
ENT
LOOP BACK TEST
ESC
Serial Port
Bytes Sent 124
Rcv Counts 0
Err Counts 124
RTS/CTS fail
