Protection Function: Stored Stroke Limit; Protection Function: Servo Off - Mitsubishi Electric M800VW Series Programming Manual

M800V/M80V Series PLC Programming Manual (2/2)
14 PLC Help Function
14.34 PLC Axis Indexing

14.34.2.9 Protection Function: Stored Stroke Limit

Movable range is set for linear axis to prevent the shaft end from clashing into the machine.
This function is available only for axis whose reference position is established.
Command values must be within the set value in any operation mode. When the machine is stopped by the stored stroke limit
function, an operation error "M00 0007 Aux ax soft limit" will occur. The operation error will be canceled by shifting the error
axis in opposite direction. When machine locates out of the movable range, only the travel command toward the movable
range is permitted.
To activate this function, set limit positions both in plus and minus direction with corresponding parameters.
The movable range will be the narrower one confined either by "#2013 OT- and #2014 OT+" or by "#8204 OT-CHECK-N and
8205 OT-CHECK-P". However, when "#8202 OT-CHECK OFF" is set to "1", the setting of "#8204 OT-CHECK-N and #8205
OT-CHECK-P" is invalid.
Setting "#8210 OT INSIDE" is invalid in PLC axis indexing.
For rotation axis, the area confined by the parameters, excluding zero point, will be prohibited.
In setting prohibited area for two or more axes using stroke limit IB and the like, note that the prohibited area will be disabled
if those axes include PLC indexing axis.
[Stored stroke limit]
Limit for (-) side
1
(-) direction
Moving into the
Stop
range is possible
POINT
In actual operation, the axis stops a little before reaching to the set position.

14.34.2.10 Protection Function: Servo OFF

This function releases the servo lock.
To use an external force such as a mechanical clamp for machine lock, stop the servo control and disable the torque output
for the deflection caused by the external force. When the servo OFF state is entered, Servo ready (RDY) will be turned OFF.
Turn OFF Motor brake control output (MBR) as well and activate motor brakes.
When Servo OFF #1064 svof
Error not correct-
0
ed
Error corrected 1
Machine decelerates to stop by turning OFF the Servo OFF signal during movement, and starts moving again by turning ON
the Servo OFF signal while the Operation start signal is ON. In JOG mode, machine will not start moving after the following
operation: deceleration to stop by the Servo OFF signal, turning OFF the Operation start signal, then turning ON the Servo
OFF signal. The machine will be positioned at next station in manual operation or automatic operation.
IB-1501668-B
Station No.
2 3 4
The travel amount during servo OFF will become the droop. When the servo is turned ON
again, the machine will return to the servo OFF position.
An alarm will occur if the droop that occurs during servo OFF exceeds the excessive error de-
tection width.
The travel amount during servo OFF will not become the droop; the machine position (com-
mand position) will be updated. Thus, when the servo is turned ON again, the machine will
stop at the position to which it moved.
Limit for (+) side
5 6
(+) direction
Moving into the
Stop
range is possible
Explanations
836