Rockwell Automation 2706-M1 MESSAGEVIEW 421 HARDWARE MANUAL - Manual (Page 111)

7–3 Troubleshooting and Maintenance
Publication 2706–816
The MessageView terminal has two LEDs which function as
terminal status indicators. These two indicators can be seen at the
back of the MessageView terminal as shown below.
Back View
COMM Indicator (Green)
FAULT Indicator (Red)
Use this table to interpret the state of the Status LEDs.
LED Status Description What to do about it
On (Steady Green) Normal operating state No problem.
COMM.
Off (power applied, but
LED not lit)
Communication fault detected:
•
Controller does not have RIO enabled
•
Baud rates on terminal do not match those of
the controller
•
Rack settings between terminal and controller
do not match
•
RIO terminal connections incorrect
Check controller settings
Set controller baud rate to match the terminal
setting. See Page 3–5.
Set controller rack settings to match the
terminal settings. See Page 3–5.
Check the RIO hardware connections.
Blinking
Communications not established:
•
Controller/Scanner is in Program Mode
Communications not established
Controller/Scanner is in Program Mode
FAULT
(hardware)
On (Steady Red)
Terminal hardware fault detected:
•
Hardware fault
•
Firmware fault
Cycle power to the terminal so it will run its
Power-On Self Tests (POST). See Page B–4.
Cycle power to the terminal so it will run its
Power-On Self Tests (POST). See Page B–4.
Off (power applied, but
LED not lit)
Normal operating state No problem.
The status of these indicator LEDs can also be determined through
Front Panel Editor (FPE) System Status options. See Page 3–35.
Terminal Status Indicators