Limitations To Electronic Gear Setting Value - Mitsubishi Electric MELDAS MDS-R Series Technical Specification And Instruction Manual

8-2-2 Limitations to electronic gear setting value

The servo drive unit has internal electronic gears. The command value from the NC is converted into a
detector resolution unit to carry out position control. The electronic gears are single gear ratios calculated
from multiple parameters as shown below. However, each value (ELG1, ELG2) must be less than 32767.
If the value overflows, the initial parameter error (alarm 37) or error parameter No. 101 (2301 with
M60S/E60 Series NC) will be output.
If an alarm occurs, the mechanical specifications and electrical specifications must be revised so that
the electronic gears are within the specified range.
(1) For semi-closed loop control
Reduced fraction of
When the above is calculated, the following conditions must be satisfied.
ELG1 ≤ 32767
ELG2 ≤ 32767
(2) For full-closed loop control
Reduced fraction of
When the above is calculated, the following conditions must be satisfied.
PGNX ≤ 32767
PGNY ≤ 32767
And,
Reduced fraction of
When the above is calculated, the following conditions must be satisfied.
PGNXsp ≤ 32767
PGNYsp ≤ 32767
POINT
ELG1 PC2×RNG1
=
ELG2 PC1×PIT×IUNIT
PGNX
PC2×RNG2×PGN1
=
PGNY
PC1×RNG1×30
PGNXsp PC2×RNG2×PGN1sp
=
PGNYsp
If the electronic gear value in the drive unit overflows, alarm 37 or error
parameter No. 101 (2301 with M60S/E60 Series NC) will be output.
8. Setup
(reduced fraction)
IUNIT = 2/NC command unit (µm)
1µm : IUNIT = 2, 0.1µm : IUNIT = 20
(reduced fraction)
PC1×RNG1×30
8 - 8
(reduced fraction)