Mitsubishi MELSEC-A A1SD71-S2 User Manual page 78

3. SPECIFICATIONS
(5)
Zero return request signals (X16, X17)
Switches ON when either of the following conditions occurs, and
OFF
when zero return is complete.
When the power supply is turned ON to the AlSD71 module
When thedrive unit READY signal
(READY)
goes OFF during BUSY
After the PC ready signal (Y2D) goes ON, it takes about 1.5 seconds
When a parameter and a zero return data are written from the peripheral
device
When zero return starts
When the following are selected in test mode of a peripheral device:
1) Zero return
2) Positioning
3) JOG operation
4)
Manual pulser
(6) Positioning commenced signals (X18, X19)
When the AlSD71 starts positioning processing by positioning (zero
return and the JOG operation are contained) and the start signal turns
ON, these signals go ON. Then, these signals go OFF when the start
signal turns OFF.
Positioning start signal (Y20)
Positioning commenced signal (X18)
Not turned ON in the test mode by a peripheral device or AD71TU.
(7) Battery error (X1 A)
Switches on when battery voltage drops.
(8) Error detection (X1 B)
Switched on by any of the errors in Chapter 8. Switched off when the
error is reset. For resetting, refer to Section 3.3.2 (7).
(9) Zero return complete (X1 C, X1 D)
Switches on to indicate the completion of zero return. Switched off at the
start of the next process.
(10)
M
code ON signals (X1 E,
X1
F)
These are turned ON when starting in the WITH mode.
When positioning is completed, they are turned ON in the AFTER mode.
When an
M
code OFF signal goes
ON,
the
M
code ON signal goes OFF.
If
the
M
code is not designated (when
M
code is set to 0), the
M
code ON
signal remains OFF
.
This signal remains OFF in the test mode when using a peripheral device
or AD71TU.
I
Remark
I
M code consists of the code numbers ( 1 to 255) allocated by a user to execute auxiliary functions
(for example, clamp, drill rotation, stop, and tool exchange command) after positioning control
using an AlSD71.
The PC CPU can execute specified auxiliary tasks by creating programs to go ON and OFF a
relay ladder by using this M code.
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