Causes And Possible Solutions For A Blank And Unresponsive Digital Operator - YASKAWA A1000 Technical Manual

Digital Operator Display
The following simultaneous contradictory settings: C6-05 is greater than 6 and C6-04 is
greater than C6-03 (carrier frequency lower limit is greater than the upper limit). If C6-05 is
less than or equal to 6, the drive operates at C6-03.
Upper and lower limits between C6-02 and C6-05 contradict each other.
Digital Operator Display
Scaling for the pulse train monitor is set to 0 (H6-07 = 0) while H6-06 is not set to 101, 102,
105, or 116.
Digital Operator Display
Torque Control in enabled (d5-01 = 1) while the Speed/Torque Control switch function is
assigned to a digital input (H1- = 71).
Either Torque Control is enabled by d5-01 = 1, the or Speed/Torque Control switch is assigned
to a digital input H1- = 71, while at the same time:
• Feed Forward is enabled (n5-01 = 1), or
• Droop Control is enabled (b7-01  0), or
• Intelligent Stall Prevention or Intelligent Stall Prevention 2 is enabled (L3-04 = 2 or 5), or
• A digital input is set for the power KEB 1 or KEB 2 (H1- = 7A or 7B)
Digital Operator Display
In AOLV/PM the automatically calculated energy saving coefficients are out of the allowable
range.
Digital Operator Display
One of the following setting errors has occurred while Online Tuning is enabled in OLV
(A1-02 = 2):
• E2-02 has been set below 30% of the original default value
• E2-06 has been set below 50% of the original default value
• E2-03 = 0
Digital Operator Display
With the entered encoder resolution (F1-01), maximum output frequency (E1-04), and motor
pole number (E5-04,) the calculation encoder signal frequency exceeds 50 kHz (with PG-F3
option).
 Causes and Possible Solutions for a Blank and Unresponsive Digital Operator
Table 6.18 Causes and Possible Solutions for a Blank and Unresponsive Digital Operator
A short circuit between +V, -V, and AC terminals.
Control circuit terminal overload.
The short circuit bar between terminals +1 and +2 in the main circuit has been removed.
Braking unit terminals P and N are connected in reverse.
Control power circuit failure
Malfunction occurred in the control power circuit.
Digital operator contact failure
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
oPE11
Cause
oPE13
Cause
oPE15
Cause
oPE16
Cause
oPE18
Cause
oPE20
Cause
Cause
6.6 Operator Programming Errors
Carrier Frequency Setting Error
Correct the setting for the carrier frequency.
Possible Solutions
Correct the parameter settings.
Pulse Monitor Selection Error
Incorrect setting of monitor selection for pulse train (H6-06).
Possible Solutions
Change scaling for the pulse train monitor or set H6-06 to 101, 102, 105, or 116.
Torque Control Setting Error
Parameters settings that are not allowed in combination with Torque Control have been set.
Possible Solutions
Correct the parameter settings.
Energy Savings Constants Error
Possible Solutions
Check and correct the motor data in E5 parameters.
Online Tuning Parameter Setting Error
Parameters that control Online Tuning are not set correctly.
Possible Solutions
Make sure E2-02, E2-03, and E2-06 are set the correct values.
PG-F3 Setting Error
The encoder signal frequency is too high.
Possible Solutions
• Set F1-01 to the correct encoder resolution.
• Reduce the maximum output frequency of the drive in parameter E1-04 so the encoder
signal frequency at maximum speed is lower than 50 kHz.
Possible Solutions
Correct wiring
Check the resistance and wiring for the frequency setting potentiometer, etc.
Check that the current for terminals +V and -V is 20 mA or less.
Attach the short circuit bar.
• Check the Braking unit wiring including cables connected to the Braking unit and relay
terminals.
• Replace the drive.
Charge indicator is lit:
• Replace the digital operator
• Replace the drive control board.
Charge indicator is not lit:
• Check the input power supply voltage
• Replace the drive.
Turn OFF the power, wait for 5 minutes, then turn ON the power again.
Turn OFF the power, remove the digital operator, then replace the digital operator.
Error Name
Error Name
Error Name
Error Name
Error Name
Error Name
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