Mitsubishi Electric M80V Series Manual page 585

M800V/M80V Series PLC Interface Manual
4 Explanation of Interface Signals
4.4 PLC Output Signals (Data Type: R***)
[Caution]
(1) During synchronous operation or independent operation, the master axis signals are valid for the "Interlock" and
"Machine lock" signals, etc.
(2) The conditions of the "Reference position reached" signal (X800) of the master axis in the synchronous operation
method follow the setting of the parameter "#1282 ext18/bit1".
(3) When any of G27, G28 and G30 is commanded during the slave axis independent operation, the slave axis returns to
its own zero point.
(4) The position switches are processed independently for the master axis and slave axis.
(5) When bit5 of the parameter #1261 is OFF, use the same "Stroke end" signal for the master axis and slave axis.
Set the same soft limit value for the master axis and slave axis.
If the above settings cannot be made because of the machine specifications, observe the following points.
- If stroke end or soft limit occurs during the manual operation mode, the master axis does not stop even when an
alarm occurs for the slave axis. Thus, make sure that the master axis alarm turns ON before the slave axis alarm.
- Stroke end during the manual operation mode causes the slave axis to stop when the "Stroke end" signal for the
master axis turns ON. The master axis is stopped by the position controller, and the slave axis is stopped by the NC
control unit. Thus, there may be a difference in their stop positions. If an excessive error alarm occurs because of
stroke end, enter the correction mode, and cancel the alarm.
(6) In the slave axis independent operation, even when the machine lock signal is ON, the current value counter of the
master axis is updated. The master axis and the slave axis are not identified in the playback. The movement amount
of the specified axis is set as it is.
(7) The master axis independent operation is handled as asynchronous. Therefore, the PLC input/output signal is not
reflected on the slave axis.
(8) Immediately after the synchronous control operation method is changed when the parameter "#1281 ext17/bit6" is
ON, the compensation amount used for the slave axis in the external machine coordinate compensation and the ball
screw thermal expansion compensation is as follows.
- When the synchronous operation is switched to the independent operation method; the slave axis compensation
amount is applied instead of the master axis compensation amount.
- When the independent operation is switched to the synchronous operation method; the master axis compensation
amount is applied instead of the slave axis compensation amount.
(9) When the parameter "#1281 ext17/bit6" is ON and the synchronous operation method is designated, the slave axis is
compensated with the master axis compensation amount in the ball screw thermal expansion compensation, and the
compensation amount of each axis is output to "Ball screw thermal displacement compensation: Compensation
amount" (R72 to R75).
(10) When the "Synchronous control operation method" (R2589) is changed (when the independent operation or synchro-
nous operation is finished) for the axis (master axis or slave axis) where both synchronous operation and chopping
are performed, the operation error (M01 1270) occurs and all the axes decelerate and stop.
(11) While the operation error (M01 1036) is occurring, the axes other than the chopping axis is interlocked and the syn-
chronous control operation method cannot be changed.
(12) While the operation error "M01 1270", "M01 1271" or "M01 1272" is occurring, all the axes are interlocked and the
synchronous control operation method cannot be changed.
(13) The "Reference position reached" signal (ZP1n to Zp4n) (X800) of the main axis and the sub axis in the simple syn-
chronous control is output when the main axis reaches the reference position.
(14) In the simple synchronous control, the signals to output to the sub axis (from NC to PLC) are uncertain except for the
"Reference position reached" signal.
(15) In the simple synchronous control, the signals to input to the sub axis (from PLC to NC) are ignored.
The sub axis in the simple synchronous control follows the "Servo OFF" signal (*SVFn) (Y7A0) of the main axis in the
simple synchronous control.
When the main axis in the simple synchronous control is used as the slave axis in the synchronous control, the sub
axis follows the "Servo OFF" signal of the master axis.
(16) Simple synchronous control and chopping cannot be used together.
IB-1501616-D 572