ZM400 Series Indicators Service Manual
35
5.1
Diag menu
5.1.3 Display
5.1.4 Buttons
5.1.5 Ports
PortS
Use this to do a loopback test for serial port 1 or 2 or to perform a write/
read test on the USB port.
SEriAL1
or
2
When you pick a serial port to test,
tESting
is briefly displayed and
then
PASS
or
FAiL
, depending on if the send and receive lines are
jumpered (pass) or not (fail). Add a jumper or wire between the
transmit output and receive input. On an external 9 pin connector the
transmit line is pin 2 and the receive line is pin 3.
uSb
Use this to test a connected USB flash drive.
oPEn
is briefly displayed, then
WritE
is briefly displayed, then
rEAd
is
briefly displayed, then
PASS
or
FAiL
, depending on if the USB device
is working correctly or not.
If no USB device is plugged in when you begin the test,
oPEn
is briefly
displayed, then
no uSb
is briefly displayed, then
uSb
.
Display
Continuous
display test
(
ZERO
exits
the test)
diSPLAY
Use to test the segments of the display. Each digit
area lights up in progression and continues until you
press
ZERO
.
Buttons
Test button
function
(
ZERO
exits
the test)
buttonS
Use to test the keys. When you begin the test
tESting
is briefly displayed followed by dashes.
Press any key to test if it is functioning and its name
or value will be displayed.
Press
ZERO
to stop the test.
Ports
USB
Serial1
Serial2
Loopback
test
Loopback
test
Performs
write/read
test
It is recommended that you insert the jumper (a paper clip works) into the external
cable connector to validate the wiring and not just the internal ports. See System
block diagram
for I/O configuration of the serial ports TB3.
