Mitsubishi Electric MELSERVO-JET MR-JET-G-N1 Series, User Manual

Page: 77 / 162

3 BASIC FUNCTION
3.4 Limit switch release position assessment function
75
3
3.4
Limit switch release position assessment function
Outline
The limit switch release position assessment function is available on servo amplifiers with firmware version B2 or later.
This function can be used in the cyclic synchronous position mode (csp) or cyclic synchronous velocity mode (csv).
Use this function in the following cases: After the limit switch has been detected, the moving part passes through the limit
switch detection position and stops. If the moving part passes through the limit switch detection position and stops, commands
in the direction where the moving part has moved cannot be accepted until the warning release conditions are met.
*1

Page 75 Precautions
Precautions
Check that the moving part is currently located in the area between the limit switches before operation. This function cannot
work properly in the following situations:
• Turning on the power while the moving part is outside the area between the limit switches.
• Resetting the controller while the moving part is outside the area between the limit switches.
• Performing homing while the moving part is outside the area between the limit switches.
• Switching the control mode while the moving part is outside the area between the limit switches.
• The limit switches are on for less than 10 ms.
Setting methods of functions
[Pr. PT38.4 Limit switch release position assessment function selection] can be used to select whether [AL. 099 Stroke limit
warning] is released without or after a limit position assessment. The stroke limit warning will be released after all the release
conditions have been met.
Limit position assessment
When the moving part returns to the position where the stroke end was detected, the warning release conditions will be met.
[Pr. PT38.4] Limit switch release position assessment function
0 Disabled
1 Enabled
LSN LSP
ON
*1 *1
OFF
ON
OFF
Limit switch
Stop upon detection of the limit switch
LSP
(Forward rotation
stroke end)
LSN
(Reverse rotation
stroke end)
[AL. 099 Stroke limit warning]
Warning
occurrence
Warning occurrence
No warning
[AL. 099 Stroke limit warning] remains on
while LSP or LSN is on.
Forward rotation
command
Reverse rotation
command
Forward or reverse
rotation command
Possible rotation direction
(Enabled)
(Enabled)