6 - 4
MELSEC-A
6 SEQUENCE PROGRAM USED FOR POSITIONINGCONTROL
6.2 List of devices used
The application of the input/output Nos. [X] [Y], internal relays [M] and data registers
[D] used in this chapter are shown below.
Device
Device
name
Axis 1 Axis 2 Axis 3
Application
Details when ON
X0
AD75 READY signal
Preparation incomplete/WDT error
X1
X2
X3 Positioning start complete signal
Start completed
X4
X5
X6 BUSY signal
BUSY (operating)
X7
X8
X9 Positioning complete signal
Positioning completed
XA
XB
XC Error detection signal
Error detected
Input
XD
XE
XF M code ON signal
Outputting M code
Y10
Y11
Y12 Positioning start signal
Requesting start
Y13
Y14
Y1C Axis stop signal
Requesting stop
Y16
Y18
Y1A Forward run JOG start signal
Starting forward run JOG
Y17
Y19
Y1B Reverse run JOG start signal
Starting reverse run JOG
AD75
Out-
put
Y1D
PLC READY signal
PLC CPU preparation completed
X20
Zero point return request OFF command
Commanding zero point return request
OFF
X21
External start valid setting command
Commanding external start valid setting
X22
External start invalid command
Commanding external start invalid
command
X23
Machine zero point return command
Commanding machine zero point return
X24
High-speed zero point return command
Commanding high-speed zero point return
X25
Positioning start command
Commanding positioning start
X26
Speed/position changeover operation
command
Commanding speed/position changeover
operation
X27
Speed/position changeover enable
command
Commanding speed/position changeover
enable
X28
Speed/position changeover prohibit
command
Commanding speed/position changeover
prohibit
X29
Movement amount change command
Commanding movement amount change
X2A
Advanced positioning control start
command
Commanding advanced positioning
control start
X2B
Positioning start command
Commanding positioning start
X2C
M code OFF command
Commanding M code OFF
X2D
JOG operation speed setting command
Commanding JOG operation speed
setting
X2E
Forward run JOG command
Commanding forward run JOG operation
X2F
Reverse run JOG command
Commanding reverse run JOG
X30
Manual pulse generator operation enable
command
Commanding manual pulse generator
operation enable
X31
Manual pulse generator operation disable
command
Commanding manual pulse generator
operation disable
X32
Speed change command
Commanding speed change
X33
Override command
Commanding override
Command
X34
—
Acceleration/deceleration time change
command
Commanding acceleration/deceleration
time change
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