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MELSEC-Q
5 SETTINGS AND PROCEDURES UP UNTIL OPERATION
5.3 Names of Parts and Functions
1)
2)
3)
1)
4)
2)
Name
Contents
1)
Indicator LED
Indicator LED (Refer to (1) for the indication contents.)
2)
CH1-side RS-232
Interface
CH1 side RS-232 interface (D-Sub 9-pin) for serial
communications with external devices and for connection of a
console / debugger.
3)
CH2-side RS-232
Interface
CH2 side RS-232 interface (D-Sub 9-pin) for serial
communications with external devices and for connection of a
console / debugger.
4)
CH3-side RS-422/485
Interface
CH3 side RS-422/485 interface (two-piece terminal block) for
making serial communication with the target device.
(console/debugger cannot be connected.)
(1) List of indicator LED's
LED name
Indication content
: Lights up/ Blinks
: Off
RUN
Indicates normal operation.
Normal
Abnormal, reset
ERR.
Indicates whether or not there is an error (
1
).
Occurrence of an
error
Normal
PRG
Indicates the Mode.
Programming mode
Run / Multitask
debug mode
P RUN
Indicates that a BASIC program is running.
BASIC program is
running.
Basic program is
stopped.
SD
Indicates the send state of each channel.
Data are being sent.
Not sending.
RD
Indicates the receive state of each channel.
Data are being
received.
Not receiving.
( 1) Lights up when a QD51 (-R24) hardware error occurs, or when a program's
execution is abnormal.
Содержание QD51
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