Mitsubishi Electric MELSEC-LD77MS2 User Manual page 399

Servo ON conditions
Setting of servo parameter
PLC READY signal [Y0] ON
All axis servo ON [Y1] ON
Starting conditions
To start the control, the following conditions must be satisfied.
The necessary start conditions must be incorporated in the sequence program so
that the control is not started when the conditions are not satisfied.
(1) Operation state
Monitor item
Axis operation status "0: Standby" or "1: Stopped"
Md.26
(2) Signal state
Signal name
PLC READY signal
READY signal
All axis servo ON
Synchronization flag
Interface
Axis stop signal
signal
M code ON signal
Error detection signal
BUSY signal
Start complete signal
Forced stop input signal
Stop signal
External
signal
Upper limit (FLS)
Lower limit (RLS)
: 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.
Chapter 6 Sequence Program Used for Positioning Control
Operation state
Signal state
ON PLC CPU preparation completed
ON LD77MS preparation completed
ON All axis servo ON
LD77MS buffer memory
ON
Accessible
OFF Axis stop signal is OFF
OFF M code ON signal is OFF
OFF There is no error
OFF BUSY signal is OFF
OFF Start complete signal is OFF
ON There is no forced stop input
OFF Stop signal is OFF
ON Within limit range
ON Within limit range
6 - 57
Buffer memory address
LD77MS2
LD77MS16
LD77MS4
809+100n 2409+100n
n: Axis No.-1
Device
LD77MS2
LD77MS16
LD77MS4
Y0
X0
Y1
X1
Y4 to Y7 Axis stop
Cd.180
X4 to X7 Status: b12
Md.31
X8 to XB Status: b13
Md.31
XC to XF X10 to X1F
X10 to X13 Status: b14
Md.31
–
–
–
–