Speed command value or
speed detection value
Output current
RUN command
“POS-SET”
Brake signal “BRK”
Torque command
Servo lock
J70: Brake Control Brake-release Timer
Servo lock
OFF
OFF
OFF OFFON
ON OFF
ON OFF
ON OFF ON
ASR integral term cancel
“P-SEL”
Vector control J96 bit 6 = 0 Operation time chart
J96 bit6 0: Brake signal ON during position control stop
1: Brake signal released during position control stop
J68 Brake Control
Brake-release Current
J95 Brake control Brake-release
Torque = 0% setting
6-7-16
Position Store Selection at Power OFF
When d220 is set to “1: Store at low voltage status,” the data of the current feedback position (d298,
d299) is stored to EEPROM when an insufficient voltage state occurs, and is restored at the next pow-
er ON. When “0: Invalid” is set, the data is cleared to zero at the next power ON.
Even if store to EEPROM is enabled when an insufficient voltage state occurs, when the motor rotates
with the power supply shut of
f, the rotation amount cannot be detected and this causes position error.
When this function is used, use of the mechanical brake is recommended.
Parameter No. Function name Data
Default
data
Unit
d220
Position Feedback Store Selec-
tion at Power Off
0: Disable
1: Store at low voltage detected
0 -
6-7-17
Excessive Positional Deviation
Excessive positional deviation is judged when the deviation between the current reference position
and current feedback position exceeds the detection level of excessive positioning deviation (d223,
d224).
When excessive positional deviation occurs, the excessive positional deviation alarm (d0) is immedi-
ately output and the motor runs freely
.
In position control, the current reference position is overwritten with the current feedback position
when inverter output turns OFF, and the positional deviation of APR is cleared. For this reason, the
excessive positional deviation alarm (d0) can be reset when the alarm stops and inverter output turns
OFF
.
6 Vector Control and Applied Functions
6-61
M1 Series Standard Type User's Manual (I669)
6-7 Position Control
6
6-7-16 Position Store Selection at Power OFF
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