How To Check For Error Using The Leds; Operation Status Indication Leds; When One Inverter Is Connected - Mitsubishi Electric FR-E720-0.1KNC Instruction Manual

4.8

How to check for error using the LEDs

4.8.1

Operation status indication LEDs

LED
Lit when refresh data is properly received. Turns OFF when a data
L.RUN
transmission is stopped for a certain period of time.
⋅ Lit when a communication error occurs in the own station and flickers
when settings of switch, etc. are changed while power is ON.
⋅ Flickers when the Pr. 542 or Pr. 543 setting is changed.
L.ERR
Reset the inverter by turning the power OFF then back ON, or through
CC-Link communication. (Refer to page 232.)
Lit during normal operation (5V is supplied in the board) (Lit even in the
noncommunication status.)
RUN
Flickers when the master station is CC-Link Ver.1 and FR-E700-NC is
CC-Link Ver. 2 compatible. (Refer to page 48.)
SD
Turns OFF when no data is transmitted.
RD
Lit when the received data carrier is detected.
REMARKS
⋅
Set the station number with Pr. 542 Communication station number (CC-Link), the transmission baud rate with Pr.543 Baud rate
selection (CC-Link). (Refer to page 105.)
4.8.2

When one inverter is connected

The following table shows how the cause of a fault can be determined with the
inverter's (FR-E700-NC) LED statuses in a system configuration that has one
inverter.
(In this example, assume SW, M/S, and PRM LEDs of the master module are OFF
(master module is in normal operation).)
LED status
RUN L.RUN SD RD
⎯ ⎯ ⎯
Description
L.ERR
Normal communication is made but CRC error has occurred due to noise.
Normal communication
Hardware fault
Hardware fault
Cannot answer due to CRC error of receive data.
Data sent to the host station does not reach destination.
Hardware fault
Hardware fault
Polling response is made but refresh receive is in CRC error.
Hardware fault
Hardware fault
Hardware fault
Data sent to the host station is in CRC error.
There is no data sent to the host station, or data sent to the host station cannot be
received due to noise.
Hardware fault
Cannot receive data due to break in the cable, etc.
Invalid baud rate or station number setting
Baud rate or station number changed during operation.
Watchdog fault (hardware fault), power disconnection, faulty power supply area
Master station is connected to CC-Link Ver. 1 and FR-E700-NC is connected to CC-
⎯
Link Ver. 2.
How to check for error using the LEDs
Operation status indicator (LED)
L.RUN L.ERR RUN
SD RD
Power CPU
supply
Cause
Master
module
Station 1
Inverter
(FR-E700-NC)
: ON, : OFF, : Flicker
75
4