Indicator Led - M-system R7C-DC16A Instruction Manual

INDICATOR LED

■ STATUS INDICATOR LED
PWR RUN ERR SD
ON ON FL FL
ON ON FL FL
ON ON FL FL
ON ON FL OFF
ON ON FL OFF
ON ON OFF FL
ON ON OFF FL
ON ON OFF OFF
ON ON OFF OFF
ON OFF FL FL
ON OFF FL FL
ON OFF FL OFF
ON OFF FL OFF
ON OFF OFF FL
ON OFF OFF FL
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, FL = Flashing
---- = Inconceivable in normal operations (e.g. LED failure)
■ DISCRETE I/O STATUS INDICATOR LED
Discrete I/O modules including those for extensions have LED indicators showing I/O signal status.
Contact ON : LED ON
Contact OFF : LED OFF
RD STATUS
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 flashes approximately in 0.5 second 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.
R7C-DC16A
EM-780-G Rev.4 P.  / 8