Emerson PACSystems RSTi-EP - Page 511

User Manual Section 12
GFK-2958L May 2021
LED Indicators and Troubleshooting 497
Module
LED
Status
Recommended action
—
Status COM1 ... COM 4
1.2 ... 4.2
Red:
—
Error IO-Link port 1 ... Error IO-Link port 4
—
Check the supply voltage
—
Check the Configuarion
1.4 ... 4.4
Yellow:
—
Status DI 0
Analog Input Modules
EP-3124
EP-3164
EP-3264
EP-3664
Status LED
Red:
—
Error in supply voltage at input current
path
—
Communication error on the system bus
—
There is a new diagnostic message
—
Channel error
—
Firmware error
—
Check that the module has been
snapped into place properly
—
Check the supply voltage
—
Check channel error
—
Check firmware, update firmware
as necessary
Status LED off and all other LEDs red: Error in
the bus network adapter power supply
—
Check the bus network adapter
supply voltage
Channel LED
1.1-4.1
Red:
—
Input signal outside permissible range
System bus cannot be accessed (for example,
caused by interruption of the bus network
adapter power supply)
—
Check the input signal
—
Check the bus network adapter
supply voltage
EP-3368
EP-3468
Status LED
Red:
Error in supply voltage at output current path
Communication error on the system bus
There is a new diagnostic message
At least one output overloaded
—
Check that the module has been
snapped into place properly
—
Check the supply voltage
—
Eliminate the overload/short-
circuit
Channel LED
1.1-8.1
Red:
— Channel error
—
Check channel error
EP-3804
EP-3704
Status LED
Red:
—
Error in supply voltage at input current
path
—
Communication error on the system bus
—
There is a new diagnostic message
—
Channel error
—
Firmware error
—
Check that the module has been
snapped into place properly
—
Check the supply voltage
—
Check channel error
—
Check firmware, update firmware
as necessary
Status LED off and all other LEDs red: Error in
the bus network adapter power supply
—
Check the bus network adapter
supply voltage
Channel LED
1.1-4.1
Red:
—
Input signal outside permissible range
—
Line break
—
Check the input signal, the cabling
and, if necessary, the sensor for
external cold-junction
compensation.