R7C-DC16B
EM-7801-H Rev.6 P. 3 / 9
INDICATOR LED
■
STATUS INDICATOR LED
PWR
RUN
ERR
SD
*
1
RD
STATUS
*
2
ON
ON
BL
BL
ON
Communicates normally with occasional CRC errors due to noise interference.
ON
ON
BL
BL
ON
Communicates normally but the Baud Rate and/or Station Address switches failed.
ERR LED blinks approximately in 0.5 seconds intervals.
ON
ON
BL
BL
OFF ----
ON
ON
BL
OFF
ON
CRC error found in the received data. Unable to respond.
ON
ON
BL
OFF
OFF ----
ON
ON
OFF
BL
ON
Normal communication
ON
ON
OFF
BL
OFF ----
ON
ON
OFF
OFF
ON
Unable to receive data addressed to the station.
ON
ON
OFF
OFF
OFF ----
ON
OFF
BL
BL
ON
Performs the interval-timed responses but CRC error found in receiving the refresh
data.
ON
OFF
BL
BL
OFF ----
ON
OFF
BL
OFF
ON
CRC error found in the data addressed to the station.
ON
OFF
BL
OFF
OFF ----
ON
OFF
OFF
BL
ON
Link is not started.
ON
OFF
OFF
BL
OFF ----
ON
OFF
OFF
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)
ON
OFF
OFF
OFF
OFF Unable to receive data due to wire breakdown
ON
OFF
ON
OFF ON/OFF Faulty Baud Rate and/or Station Address setting
OFF
OFF
OFF
OFF
OFF Power input removed. Or power supply failure.
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
056 222 38 18
www.sentronic.com
SENTRONIC
AG
