7 Buffer Memory
7.3 Positioning Parameters
64
FX3U-1PG User's Manual
7.3.12 [BFM#32] Positioning parameter selection
Select whether the positioning parameter (BFM#0 to #15) is used or the extension positioning parameter
(BFM#33 to #52) is used.
Point
• When the parameter is changed during the operation, the change becomes valid from the next operation.
• Set the positioning parameter to the buffer memory that corresponds to the selected positioning parameter.
7.3.13 [BFM#34, #33] Pulse rate
Set the number of pulses required to rotate the motor for one turn.
Setting is necessary when the unit system is set to "machine system unit" or "combined system unit."
When "motor system unit" is selected, the setting here will be ignored.
→ For details on the system of units, refer to Subsection 7.3.15.
Point
• If any electronic gearing is present in the servo amplifier, it is necessary to consider its effect.
The relationship between pulse rate and electronic gearing is shown below.
Pulse rate = Resolution power of encoder (positioning feedback pulses) ÷ Electronic gearing
• When the positioning parameter is used, use the pulse rate (BFM#0).
7.3.14 [BFM#36, #35] Feed rate
Set the travel distance of the machine for one turn of the motor.
Setting is necessary when the unit system is set to "machine system unit" or "combined system unit."
When "motor system unit" is selected, the setting here will be ignored.
→ For details on the system of units, refer to Subsection 7.3.15.
Point
When the positioning parameter is used, use the feed rate (BFM#2, #1).
BFM No.
Description R/W Default
High order
16bit
Low order
16bit
-#32
b0 = OFF (0): Positioning parameter (BFM#0 to #15) is used
b0 = ON (1): Extension positioning parameter (BFM#32 to #52) is used
b1 to b15: Not used
R/W H0000
BFM No.
Description R/W Default
High order
16bit
Low order
16bit
#34 #33 Setting range: 1 to 2,147,483,647 PLS/REV R/W K2,000
BFM No.
Description R/W Default
High order
16bit
Low order
16bit
#36 #35
Setting range: 1 to 2,147,483,647 (μm/REV, mdeg/REV, 10
-4
inch/REV)
R/W K1,000
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