
1.HARDWARE MAINTENANCE B-63994EN/02
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1.2.2 LED Indications on the PROFIBUS Slave Board
LED1
LED2
CN2
LED3LEDB
NOTE
The face plate is indicated by the broken line.
Name Color Description
LED1 Green
Indicates whether the CPU of this board has been
activated.
Lit if the CPU has been released from the reset state
and activated.
The LED does not go on when the power is turned on.
LED2 Green
Indicates that communication has started.
Lit: Communication has started.
This LED is off when the power is turned on or in the
following cases:
- Parameter data and configuration data are not
received.
- Invalid parameter data or configuration data is
received.
LED3 Green
Indicates whether normal communication is performed.
Lit if normal communication is performed.
Not lit if communication is not performed.
The LED does not go on when the power is turned on.
LEDB Red
Indicates that a RAM parity alarm is issued on the
board.
Lit: A RAM parity alarm is issued.
This LED is off when the power is turned on. Once the
LED goes on, the LED is not turned off until the power is
turned off.