Emerson Tescom ER5000 Series User Manual page 208

ER5000 — Troubleshooting
Operation
Checking the LED Indicators
WARNING
Be aware that the controller is connected to the power supply and
that critical components of the controller are exposed when the
cover is removed to inspect the LED indicators. Always use extreme
caution when the cover is removed.
Figure 64 shows the position of the four LED indicators on the
circuit board of the ER5000. The LED indicators give you a quick
visual reference to evaluate the status of the controller.
During installation, use LED1 (red) and LED4 (red) to verify that
you have correctly wired the ER5000 to its power supply.
If you are communicating via RS485, for example as part of a
daisychain on a network, LED2 (green) and LED3 (amber) verify
that the ER5000 is sending and receiving data.
NOTE NOTE
Refer to page 89 through
connect the ER5000 to an RS485 converter.
CAUTION CAUTION
NOTE NOTE
LED2 and LED3 respond to data transmission when the
ER5000 communicates using RS485. These LEDs do not respond to data
WARNING WARNING
CAUTION CAUTION
transmission when the ER5000 communicates using USB and may be on or
off depending on the specific configuration of your application. They do not
WARNING WARNING
need to be checked during installation or operation when USB is used.
page 93 for correct wiring to
The LEDs can help you troubleshoot controllers that are not
functioning properly.
LED3
Receiving Data
(amber)
blinks when ER5000
is receiving data in via
RS485
LED1
Power Indicator
(red)
should be on
continuously
Figure 64: LED Indicators
LED2
Sending Data
(green)
blinks when ER5000
is sending data
out via RS485
LED4
"Heartbeat"
(red)
should blink on and off at
a steady rate
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