Communication port test – Rockwell Automation 2707-M232P3_M485P3 DTAM Micro Operator Interface Module User Manual
Page 83
Chapter 8
Troubleshooting and Maintenance
8–9
Use the communications test to verify the operation of the RS-232 or
RS-485 port.
The communications test requires a loopback connector. You can construct a
simple loopback connector as follows:
9 Pin Female
1
Data Out –
2
Data Out +
3
Data In -
4
Data In +
5
Signal Ground
6
Transmit Enable
7
Not Used
8
Signal Ground
9
Shield
Pin# Signal Name
9 Pin Female
1
Not Used
2
Receive Data (RD)
3
Transmit Data (TD)
4
Not Used
5
Signal Ground
6
Not Used
7
Not Used
8
Not Used
9
Shield
Pin# Signal Name
Connects pins 2
!3
Loopback Connector
RS-232 Port
RS-485 Port
Connects pins 1
!3
and pins 2
! 4
Loopback Connector
To test the communications port:
1. Use the [NEXT] and [PREV] keys to display Comm on the
test selection screen.
DTAM Micro Diag Test
Comm Test
2. Press [
] to initiate the test.
The DTAM Micro will continuously send out and receive a message at
the same port. The message is DTAM Micro self looping serial test
ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789.
DTAM Micro self loop
ing serial test ABCD
3. Press any key to terminate the communications test.
The next test selection screen is displayed.
DTAM Micro Diag Test
RAM Test
4. To terminate the test function , press the [NEXT] and [PREV] keys to
display Reset DUT in the test selection area. Press [
] to reset the
terminal.
Communication Port Test