Mitsubishi Electric MELSERVO MR-J2 C Series, Instruction Manual

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3. SIGNALS AND WIRING
3.4.3 Override
POINT
When using the override (VC), make the override selection (OVR) device
available.
The override (VC) may be used to change the servo motor speed. The following table lists the signals
and parameter related to the override:
Item Name Remarks
Analog input signal Override (VC)
Contact input signal Override selection (OVR)
Set-up Software setting required.
Parameter No.25 override offset 999 to 999mV
(1) Override (VC)
By applying a voltage ( 10 to 10V) to the override (VC) terminal, change values can be set from
outside consecutively. The following graph shows the relationship between the input voltage and the
ratio of actual speed to preset speed.
Override selection (OVR)
OVR
SG
VC
LG
Servo amplifier
Override (VC)
Override (VC) application voltage
Ra
tio of
act
ua
l speed t
o
p
re
set
speed
10 10
200
[%]
0
[V]
0
100
SD
10 to 10V
(2) Override selection (OVR)
Used to make the override (VC) valid or invalid.
Servo amplifier
Override selection
(OVR)
O
verri
de
Override (VC)
10 to 10V
Motor
Using the override selection (OVR), choose a change value as follows:
External Input Signal
OVR
Speed Change Value
0 No change
1 Override (VC) setting is made valid.
Note. 0 : Off (open) across OVR-SG
1 : On (shorted) across OVR-SG
(3) Override offset (parameter No.25)
Using parameter No.25, the offset voltage can be set relative to the input voltage for the override (VC).
The setting is between 999 to 999mV.
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