6 - 72
Chapter 6 Sequence Program Used for Positioning Control
(2) Signal state
Device
Signal name
Signal state
QD77MS2
QD77MS4
QD77MS16
PLC READY signal
ON PLC CPU preparation completed
Y0
QD77 READY signal
ON QD77MS preparation completed
X0
All axis servo ON
ON All axis servo ON
Y1
Synchronization flag ON
QD77MS buffer memory
Accessible
X1
Axis stop signal
OFF Axis stop signal is OFF
Y4 to Y7
Cd.180
Axis stop
M code ON signal
OFF M code ON signal is OFF
X4 to X7
Md.31
Status: b12
Error detection signal
OFF There is no error
X8 to XB
Md.31
Status: b13
BUSY signal
OFF BUSY signal is OFF
XC to XF
X10 to X1F
Interface
signal
Start complete signal
OFF Start complete signal is OFF
X10 to X13
Md.31
Status: b14
Forced stop input signal ON There is no forced stop input
–
Stop signal
OFF Stop signal is OFF
–
Upper limit (FLS)
ON Within limit range
–
External
signal
Lower limit (RLS)
ON Within limit range
–
: When the synchronous setting of the PLC CPU is made in the nonsynchronous mode, this must be
provided as an interlock.
When it is made in the synchronous mode, no interlock must be provided in the program because the flag is
turned ON when calculation is run on the PLC CPU.
[5] Time chart for restarting
[QD77MS4 operation example]
0
V
t
1
Dwell time
8
1
8
0
0
0
Positioning start signal
Axis stop signal
QD77 READY signal
Start complete signal
BUSY signal
Error detection signal
Cd. 6 Restart command
Positioning complete signal
PLC READY signal
Md. 26 Axis operation status
[Y10]
[Y4]
[Y0]
[X0]
[X10]
[XC]
[X14]
[X8]
All axis servo ON
[Y1]
(Note): Refer to Section 3.3 for input/output signal of QD77MS16.
Fig. 6.14 Time chart for restarting
Summary of Contents for MELSEC-Q QD77MS
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Page 27: ...A 26 MEMO...
Page 29: ...MEMO...
Page 101: ...3 34 Chapter 3 Specifications and Functions MEMO...
Page 232: ...5 111 Chapter 5 Data Used for Positioning Control MEMO...
Page 315: ...5 194 Chapter 5 Data Used for Positioning Control MEMO...
Page 337: ...6 22 Chapter 6 Sequence Program Used for Positioning Control...
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Page 413: ...MEMO...
Page 433: ...8 20 Chapter 8 OPR Control MEMO...
Page 458: ...9 25 Chapter 9 Major Positioning Control MEMO...
Page 593: ...10 30 Chapter 10 High Level Positioning Control MEMO...
Page 625: ...11 32 Chapter 11 Manual Control MEMO...
Page 659: ...12 34 Chapter 12 Expansion Control MEMO...
Page 767: ...13 108 Chapter 13 Control Sub Functions MEMO...
Page 813: ...14 46 Chapter 14 Common Functions MEMO...
Page 831: ...15 18 Chapter 15 Dedicated Instructions MEMO...
Page 846: ...16 15 Chapter 16 Troubleshooting MEMO...
Page 892: ...16 61 Chapter 16 Troubleshooting MEMO...
Page 971: ...Appendix 62 Appendices MEMO...
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