Mitsubishi Electric FX3U-1PG - BFM#3] Operation Parameter

7 Buffer Memory
7.3 Positioning Parameters
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FX3U-1PG User's Manual
7.3.3 [BFM#3] Operation parameter
Set basic conditions such as the unit system.
Point
When the extension positioning parameter is used, use the operation parameter (BFM#37).
b1, b0: System of units
Units for positioning control are set as follows.
Conversion of the unit system
The following relationship exists between the motor system unit and the machine system unit, and the pulse
conversion is executed automatically.
• Travel distance (PLS) = Travel distance (μm, mdeg, 10
-4
inch) × Pulse rate × Position data multiplier ÷
Feed rate
• Operation speed (Hz) = Operation speed (cm/min, 10deg/min, inch/min) × Pulse rate × 10
4
÷ Feed rate ÷ 60
→ For the command errors, refer to Subsection 6.9.1.
Point
• When the unit system is set to the machine system unit or the combined system unit, settings of the pulse
rate and the feed rate are necessary.
• When the operation speed is executed in the machine system unit, set the value such that its pulse
converted equivalent is within the motor system unit (Hz) range or the combined system unit (Hz) range.
BFM No.
Description R/W Default
High order
16bit
Low order
16bit
- #3 Refer to the following. R/W H0000
Bit status
System of
units
Position unit Speed unit Remarks
b1 b0
0 0 Motor system PLS Hz
The pulse number is used as the standard for the position
command and the operation speed.
01
Machine
system
μm
mdeg
10
-4
inch
cm/min
10deg/min
inch/min
μm, mdeg, and 10
-4
inch is used as the standard for the
position command and the speed.
10
Combined
system
μm
mdeg
10
-4
inch
Hz
Combined units are used, such as the machine system unit for
the position command and the motor system unit for the speed
command.
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