Mitsubishi Electric MELSEC QS Series User Manual page 93

7
PROCEDURE BEFORE STARTING DATA LINK
POINT
(1) Always turn the power of the corresponding station OFF before mounting or
removing the terminal block. If it is mounted or removed without turning OFF
the power, correct data transmission by the mounted or removed station will
not be guaranteed.
(2) Always power off the system in advance when removing the terminating
resistor to change the system. If it is removed and mounted while the system
is energized, correct data transmission will not be guaranteed.
7.3 Mounting and Installation
7.3.1 Handling Precautions
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