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Continuing from the previous page
No.
Startup Flow
Trouble
Investigation
Possible Cause
Countermeasures
Steps specific to the position control mode
The servomotor
does not start.
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.
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).
3
Input the command
pulse (test
operation).
The servomotor
turns in the
reverse
direction.
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.
The setting of parameter PA14 is
incorrect.
Make a correct setting of parameter
PA14.
Steps specific to the speed control mode
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).
1. The analog speed command indicates
0V.
2. An incorrect connector connection
interrupts application of voltage.
1. Apply correct voltage.
2. Connect the connector correctly.
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.
1. Both ST1 and ST2 are off.
Both ST1 and ST2 are on.
2. An incorrect connector connection
interrupts normal signal inputs.
1. Turn on ST1/ST2 correctly.
2. Connect the connector correctly.
Check internal speed
commands 1 to 7 (parameters
PC05 to PC11).
The parameter is set to 0.
Make correct settings of 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).
The torque limit level is too low in
comparison with the load torque.
Make correct settings of the forward
rotation torque limit (parameter
PA11) and the reverse rotation torque
limit (parameter PA12).
4
Turn on forward
start (ST1) or
reverse start
(ST2).
The servomotor
does not start.
If the analog torque limit
(TLA) is in the status that
enables its use, see the
status display to check the
input voltage.
The torque limit level is too low in
comparison with the load torque.
Apply correct voltage to the analog
torque limit (TLA).
Steps specific to the torque control mode
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).
1. The analog speed command indicates
0V.
2. An incorrect connector connection
interrupts application of voltage.
1. Apply correct voltage.
2. Connect the connector correctly.
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.
1. Both RS1 and RS2 are off.
Both RS1 and RS2 are on.
2. An incorrect connector connection
interrupts normal signal inputs.
1. Turn on RS1/RS2 correctly.
2. Connect the connector correctly.
Check internal speed limit
commands 1 to 7 (parameters
PC05 to PC11).
The parameter is set to 0.
Make correct settings of internal
speed limits 1 to 7 (parameters PC05
to PC11).
Check the value of the
maximum output of the analog
torque command (parameter
PC13).
The torque command level is too low in
comparison with the load torque.
Make correct settings of the forward
rotation torque limit (parameter
PA11) and the reverse rotation torque
limit (parameter PA12).
5
Turn on the forward
rotation selection
(RS1) or the
reverse rotation
selection (RS2).
The servomotor
does not start.
Check the forward rotation
torque limit (parameter
PA11) and the reverse
rotation torque limit
(parameter PA12).
The parameter is set to 0.
Apply correct voltage to the analog
torque limit (TLA).
* For what to do when an alarm occurs, see section 6.1.
4 － 8
Summary of Contents for MR-J2S CP-S084 Series
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