YASKAWA SVC - Page 85

3.4 Motion Parameter Details
3.4.1 Fixed Parameter Details
3-32
 Servomotor Gear Ratio Term and Machine Gear Ratio Term
Set the gear ratio between the motor and the load.
The following two values are set for a machine configuration in which the load axis turns n
times in response to m turns of the motor axis.
• Servomotor gear ratio term = m
• Machine gear ratio term = n
Refer to the following section for details.
5.1.2 Electronic Gear on page 5-3
Setting Precautions
• This parameter is not used if fixed parameter No. 4 (Reference Unit Selection) is set to 0
(Pulses).
• This parameter is not valid for linear motors.
Infinite-length Axis Reset Position
 Infinite-length Axis Reset Position (POSMAX)
Set the reset position for an infinite-length axis.
This parameter is valid when bit 0 (Axis Selection) in fixed parameter No. 1 is set to 1 (Infinite-
length axis). The position information for infinite-length axes is controlled in the range from 0 to
POSMAX.
Software Limits
 Positive Software Limit
Set the position to detect the software limit in the forward direction for the MP3000.
Setting Precautions
• If an axis attempts to move in the forward direction past this position, a positive software limit
alarm occurs and bit 3 in the IL04 monitor parameter changes to 1.
• This parameter is valid when bit 1 (Enable Positive Software Limit) in fixed parameter No. 1 is
set to 1 (Enabled).
• The software limit is enabled only after bit 5 (Zero Point Return/Setting Completed) in the
IW0C monitor parameter changes to 1 (Completed). Refer to the following section for
details.
6.3 Software Limits on page 6-9
No. Name Setting Range Setting Unit Default
8 Servomotor Gear Ratio Term 1 to 65,535 revolutions 1
9 Machine Gear Ratio Term 1 to 65,535 revolutions 1
No. Name Setting Range Setting Unit Default
10
Infinite-length Axis Reset Posi-
tion
1 to 2
31
−1
Reference units 360,000
No. Name Setting Range Setting Unit Default
12 Positive Software Limit
-2
31
to 2
31
−1
Reference units
2
31
−1
SVC
SVR
SVC
SVR
POSMAX
0
Position
Forward
Reverse
SVC