Software Position Limit [G]; Setting Method - Mitsubishi Electric MELSERVO-J5 User Manual

4.8

Software position limit [G]

Specify the upper and lower limits of the command position and current position. If a command position exceeding the limit
position is specified, the command position is clamped at the limit position. Specify the limit position relative to the machine
home position (position address = 0).
The limit position includes [Home offset (Obj. 607Ch)]. Specify the limit position in consideration of the value in [Home offset
(Obj. 607Ch)]. Refer to [Pr. PT08 Homing position data] for details.
[AL. 098 Software position limit warning] occurs when clamp processing is being performed with the command position
exceeding the limit value. Operation can be resumed by giving a position command in the reverse direction of the reached
software position limit.
In the cyclic synchronous position mode (csp), stop the command when the software position limit is detected. When the
command position exceeds 32 bits (-2147483648 to 2147483647), [AL. 069 Command error] occurs. When the command
position exceeds the limit range by 30 bits (-536870912 to 536870911), [AL. 069 Command error] also occurs.
If [AL. 069 Command error] occurs, the home position is erased. Perform homing again.
• This function is enabled in the cyclic synchronous position mode (csp), profile position mode (pp), point
table mode (pt), and JOG operation mode (jg). This function is disabled during homing.
Precautions
• At factory setting, the software position limit is disabled.
• The unit can be changed to 0.001 mm, 0.0001 inch, 0.001 degree, or pulses with the setting of [Pr. PT01.2 Unit for position
data].
• Change the settings of this function during servo off, homing mode, velocity mode, and torque mode. When the setting is
changed during servo-on in the position mode and positioning mode, [AL. 035 Command frequency error], [AL. 069
Command error], and [AL. 098 Software position limit warning] may occur.

Setting method

Servo parameter setting
Servo Symbol
parameter
PT15 LMP
PT17 LMN
The enabling/disabling conditions of the software position limit are shown in the table below.
[Pr. PT01.2] Conditions
[Pr. PT15] > [Pr. PT17]
0 (mm) Enabled
1 (inch)
3 (pulse)
2 (degree) Enabled
4 APPLICABLE FUNCTIONS
338
4.8 Software position limit [G]
Name
Software position limit +
Software position limit -
[Pr. PT15] < [Pr. PT17]
Disabled
Enabled
Outline
Set the software position limit + value.
Initial value: 0
Set the software position limit - value.
Initial value: 0
[Pr. PT15] = [Pr. PT17]
Disabled
Disabled