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APPENDICES
- - - - - - - - - - - - - - - - - - - - MELSEC-A
Table 2.1 List of Special Relays (Continued)
_eel
Number
Name
De8crlptlon
Delell.
Speclel
Register.
Data memory
OFF: No processing
• Clear all data memory (except special relays
M9016
clear flag
ON
: Output clear
and special registers) in remote run mode from
-
computer, etc. when M9016 is
1.
• Clears all unlatched data memory (except
M9017
Data memory
OFF: No processing
special relays and special registers) in remote
-
clear flag
ON
: Output clear
run mode from computer, etc. when M9017
is 1.
M9020
User timing
• Relay which repeats ON/OFF at intervals of
clock No. 0
predetermined scan.
• When power is turned ON or reset is
User timing
performed, the clock starts with OFF.
M9021
clock No.1
02 scan
02
scan
• Set the intervels of ON/OFF [DUTY]
====Ftj
instruction.
M9022
User timing
-
clock No.2
01 scan
~
H
DUTY
I
nl
I
n2
I
M9020H
M9023
User timing
clock No.3
M9024
User timing
clock No.4
M9030
0.1 second
~
• 0.1 second, 0.2 second, 1 second, 2 second,
clock
seconds seconds
and 1 minute clocks are generated.
• Not turned ON and OFF per scan but turned
M9031
0.2 second
~e~ondsl
0.1
LJ
ON and OFF even during scan if
clock
seconds
corresponding time has elapsed.
• Starts when power is turned ON or reset is
1 second
0.5
105
LJ
performed.
M9032
-
clock
seconds seconds
M9033
2 second
~
clock
M9034
1 minute
~
clock
seconds 30
seconds
ON
• Used as dummy contacts of initialization and
M9036
Normally ON
OFF
application instruction in sequence
program.
ON
• M9036 and M9037 are switched ON/OFF
M9037
Normelly OFF
OFF
Independently of the CPU RUN/STOP switch
position. M9038 and M9039 are switched
ON/OFF in accordance with the RUN/STOP
switch position, l.e. switched OFF when the
-
ON only for 1
ON
~
1 scan
switch is set to STOP. When the switch is set
M9038
scan after run
OFF
to other than STOP, M9038 is only switched
ON during 1 scan and M9039 is only switched
~
1 scan
OFF during 1 scan.
RUN flag (off
ON
M9039
only for 1
OFF
scan after run)
M9040
PAUSE enable
OFF: PAUSE disabled
• When RUN key switch is at PAUSE position or
coil
ON
: PAUSE enabled
remote pause contact has turned ON and if
M9040 is ON, PAUSE mode is set and M9041 is
-
PAUSE status
OFF: During pause
turned ON.
M9041
contact
ON
:
Not during pause
APP-7

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