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INDICATOR LED
■ STATUS INDICATOR LED
SD *
PWR
RUN
ERR
1
ON
ON
BL
BL
ON
ON
BL
BL
ON
ON
BL
BL
ON
ON
BL
OFF
ON
ON
BL
OFF
ON
ON
OFF
BL
ON
ON
OFF
BL
ON
ON
OFF
OFF
ON
ON
OFF
OFF
ON
OFF
BL
BL
ON
OFF
BL
BL
ON
OFF
BL
OFF
ON
OFF
BL
OFF
ON
OFF
OFF
BL
ON
OFF
OFF
BL
ON
OFF
OFF
OFF
ON
OFF
OFF
OFF
ON
OFF
ON
OFF ON/OFF Faulty Baud Rate and/or Station Address setting
OFF
OFF
OFF
OFF
OFF = OFF, ON = ON, BL = Blinking
*1. SD LED may look not blinking but ON with high baud rate and fewer connected modules.
*2. LEDs indicated with "----" in STATUS rarely occurs in normal operation (LED failure or the like as possible cause).
■ DISCRETE OUTPUT STATUS INDICATOR LED
LED indicators show the signal status.
ON : LED ON
OFF : LED OFF
SEN TRONIC
STATUS *
RD
2
ON
Communicates normally with occasional CRC errors due to noise interference.
ON
Communicates normally but the Baud Rate and/or Station Address switches failed.
ERR LED blinks approximately in 0.5 seconds intervals.
OFF
----
ON
CRC error found in the received data. Unable to respond.
OFF
----
ON
Normal communication
OFF
----
ON
Unable to receive data addressed to the station.
OFF
----
ON
Performs the interval-timed responses but CRC error found in receiving the refresh
data.
OFF
----
ON
CRC error found in the data addressed to the station.
OFF
----
ON
Link is not started.
OFF
----
ON
No data addressed to the station. Or unable to receive data addressed to the station
due to noise interference. (Missing parts of the data sent from the master)
OFF
Unable to receive data due to wire breakdown
OFF
Power input removed. Or power supply failure.
056 222 38 18
AG
mailbox@sentronic.com
www.sentronic.com
R7C-DC16B
EM-7801-H Rev.6 P. 3 / 9
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