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9-15
9-4 Setting the Mode
OMNUC G5-SERIES AC SERVOMOTOR AND SERVO DRIVE USER'S MANUAL
9
Operation
Reasons for No Rotation
A number is displayed to indicate the reason the motor does not rotate.
Number
Item
RELEVANT
CONTROL
mode
Description
Flashing
Alarm or warning has
occurred
All
An alarm has occurred. Warning has occurred.
0
No reason
All
No reason has been detected. The motor operation should be
possible.
1
Main power supply
interrupted
All
The main power supply to the driver is not turned ON.
2
No RUN input
All
The operation command (RUN) is not connected to COM.
3
Drive prohibition input is
enabled.
All
When Pn504 = 0 (drive prohibition input enabled):
• The forward drive prohibition input (POT) is open and the speed
command is in the forward direction.
• The reverse drive prohibition input (NOT) is open and the speed
command is in the reverse direction.
4
Low torque limit setting
All
The currently effective torque limit set value, Pn013 (No. 1 Torque
Limit) or Pn522 (No. 2 Torque Limit), is less than 5% of the rated
torque.
5
Analog torque limit input is
enabled.
P, S
When Pn527 = 0 (analog torque limit scale):
• The forward analog torque limit input is negative and the speed
command is in the forward direction.
• The reverse analog torque limit input is positive and the speed
command is in the reverse direction.
6
IPG input is enabled.
P
Pn518 = 0 (command pulse prohibition input enabled) and the IPG
input is open.
7
Frequency of command
pulse input is low.
P
• The command pulse is not input correctly.
• The input selected in Pn005 is not connected correctly.
• The type of input selected in Pn006 or Pn007 is not correct.
The position command per control cycle is 1 pulse or less and the
above are some of the possible causes.
8
ECRST input is enabled.
P
Pn517 = 0 (Error counter reset at the level) and the error counter
reset input (ECRST) is connected to COM.
9
VZERO input is enabled.
S, T
Pn315 = 1 (zero speed designation enabled) and the zero speed
designation input (VZERO) is open.
10
External speed command
is low.
S
The analog speed command is 0.06 V or lower when the analog
speed command is selected.
11
Internal speed command
is 0.
S
The internal speed command is 30 r/min or less when the internal
speed command is selected.
12
Torque command is low
T
The analog torque command input (REF or PCL) is 5% or less of the
rated torque.
13
Speed limit is low
T
• Pn317 = 0 (speed limit with No. 4 internally set speed) and the
No. 4 Internally Set Speed (Pn307) is 30 r/min or lower.
• Pn317 = 1 (speed limit with REF input) and the analog speed
command input (REF) is 0.06 V or lower.
...Position control
...Full closing control
CONTROL
mode
Reason
number
...Torque control
...Speed control