Mitsubishi Electric MELSERVO-J2S Series Manual page 128

Continuing from the previous page
No. Startup Flow Trouble
Steps specific to the position control mode
3 Input the command The servomotor
pulse (test does not start.
operation).
The servomotor
turns in the
reverse
direction.
Steps specific to the speed control mode
4 Turn on forward The servomotor
start (ST1) or does not start.
reverse start
(ST2).
Steps specific to the torque control mode
5 Turn on the forward The servomotor
rotation selection does not start.
(RS1) or the
reverse rotation
selection (RS2).
* For what to do when an alarm occurs, see section 6.1.
Investigation
See the status display
(MR-J4-_A Servo Amplifier
Technical Materials, Section
4.5, issued by Mitsubishi
Electric Corporation) to
check the command pulse
accumulation.
See the status display
(MR-J4-_A Servo Amplifier
Technical Materials, Section
4.5, issued by Mitsubishi
Electric Corporation) to
check the input voltage of the
analog speed command (VC).
See the external input signal
display (MR-J4-_A Servo
Amplifier Technical Materials,
Section 4.5, issued by
Mitsubishi Electric
Corporation) to check the on/off
status of the input signal.
Check internal speed
commands 1 to 7 (parameters
PC05 to PC11).
Check the forward rotation
torque limit (parameter
PA11) and the reverse
rotation torque limit
(parameter PA12).
If the analog torque limit
(TLA) is in the status that
enables its use, see the
status display to check the
input voltage.
See the status display (MR-J4-_A
Servo Amplifier Technical
Materials, Section 4.5, issued by
Mitsubishi Electric Corporation)
to check the input voltage of the
analog torque command (TC).
See the external input signal
display (MR-J4-_A Servo
Amplifier Technical Materials,
Section 4.5, issued by
Mitsubishi Electric
Corporation) to check the on/off
status of the input signal.
Check internal speed limit
commands 1 to 7 (parameters
PC05 to PC11).
Check the value of the
maximum output of the analog
torque command (parameter
PC13).
Check the forward rotation
torque limit (parameter
PA11) and the reverse
rotation torque limit
(parameter PA12).
４-８
4 － 8
Possible Cause
1. If this is a case of an open
corrector pulse row input, 24V DC
power is not supplied to OPC (Pins 11
and 9 of the currently used cable at
CN1A are short-circuited (the
circuit is broken).)
2. Pulses are not input (incorrect
setting of parameter PA13).
3. Pulses are not input (an incorrect
connection of a connector).
4. The setting of the electronic gear
is incorrect.
The setting of parameter PA14 is
incorrect.
1. The analog speed command indicates
0V.
2. An incorrect connector connection
interrupts application of voltage.
1. Both ST1 and ST2 are off.
Both ST1 and ST2 are on.
2. An incorrect connector connection
interrupts normal signal inputs.
The parameter is set to 0.
The torque limit level is too low in
comparison with the load torque.
The torque limit level is too low in
comparison with the load torque.
1. The analog speed command indicates
0V.
2. An incorrect connector connection
interrupts application of voltage.
1. Both RS1 and RS2 are off.
Both RS1 and RS2 are on.
2. An incorrect connector connection
interrupts normal signal inputs.
The parameter is set to 0.
The torque command level is too low in
comparison with the load torque.
The parameter is set to 0.
Countermeasures
1. Replace the currently used cable.
2. Make a correct setting of parameter
PA13 (see section 2.6.5 for the
details).
3. Connect the connector correctly.
4. Make a correct setting of parameters
PA06 and 07 (see section 4.2 for the
details).
Make a correct setting of parameter
PA14.
1. Apply correct voltage.
2. Connect the connector correctly.
1. Turn on ST1/ST2 correctly.
2. Connect the connector correctly.
Make correct settings of internal
speed commands 1 to 7 (parameters PC05
to PC11).
Make correct settings of the forward
rotation torque limit (parameter
PA11) and the reverse rotation torque
limit (parameter PA12).
Apply correct voltage to the analog
torque limit (TLA).
1. Apply correct voltage.
2. Connect the connector correctly.
1. Turn on RS1/RS2 correctly.
2. Connect the connector correctly.
Make correct settings of internal
speed limits 1 to 7 (parameters PC05
to PC11).
Make correct settings of the forward
rotation torque limit (parameter
PA11) and the reverse rotation torque
limit (parameter PA12).
Apply correct voltage to the analog
torque limit (TLA).