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6.3 Part Names
6
PRE-OPERATIONAL PROCEDURES AND SETTINGS
(1) Display LED list
* 1 For troubleshooting, refer to the following.
CHAPTER 11
Figure 6.3 QJ71MB91 LEDs
Table6.3 Description of LEDs
LED name Indication
Description
ON/Flashing OFF
RUN Normal operation Normal Watch dog timer error, hardware fault
ERR.
Error indication
*1
Error occurred Normal
CH1/
CH2
NEU. Neutral status
Master function Request message not transmitted
Waiting for response message from
slave
Slave function
Waiting for request message from
master
Request message being processed
SD Transmission status Data being transmitted Data not transmitted
RD Reception status Data being received Data not received
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