[When in Trouble]

 

 

 

 

 

 

Protective￿

Error￿

Causes

Measures

 

function

code No.

 

 

 

 

*Encoder

21

Communication between the encoder and the driver

• Make a wiring connection of the encoder as per the

 

communi-

 

has been interrupted in certain times, and

wiring diagram. Correct the miswiring of the

 

cation error

 

disconnection detecting function has been triggered.

connector pins. Note that the encoder cable to be

 

 

connected to CN X6. (Check that the encoder cable

 

protection

 

 

 

 

 

is not connected to the connector CN X7 for external

 

 

 

 

scale connection by mistake.)￿

 

*Encoder

 

Communication error has occurred in data from the

 

23

• Secure the power supply for the encoder of DC5V±5%

 

communi-

 

encoder. Mainly data error due to noise. Encoder

(4.75 to 5.25V)...pay an attention especially when the

 

cation ￿

 

cables are connected, but communication data has

encoder cables are long.￿

 

 

some errors.

• Separate the encoder cable and the motor cable if

 

data error ￿

 

 

 

 

they are bound together.￿

 

protection

 

 

 

 

 

• Connect the shield to FG...Refer to P.38, "Wiring to

 

 

 

 

the Connector, CN X6" of Preparation.

 

 

 

 

 

 

Position

24

Deviation pulses have exceeded the setup of SV.Pr70

￿

 

deviation

 

(Position deviation error level). ￿

￿

 

excess

 

1)The motor movement has not followed the command.￿1)Check that the motor follows to the position

 

protection

 

￿

command. Check that the output toque has not

 

 

￿

saturated in torque monitor. Make a gain adjustment.

 

 

 

 

 

 

￿

Set up maximum value to SV.Pr5E (1st torque limit)

 

 

 

￿

and SV.Pr5F (2nd torque limit). Make a encoder

 

 

 

￿

wiring as per the wiring diagram. Set up the longer

 

 

 

￿

acceleration/deceleration time. Lower the load and

 

 

 

￿

speed.￿

 

 

 

2)Setup value of SV.Pr70 (Position deviation error

2)Set up a larger value to SV.Pr70, or set up 0

 

 

 

level) is small.

(invalid).

 

 

 

 

 

 

*Hybrid

25

Position of load by the external scale and position of

• Check the connection between the motor and the load.

 

deviation

 

the motor by the encoder slips larger than the setup

Check the looseness, slippage and backlash.￿

 

excess

 

pulses with SV.Pr7B (Setup of hybrid deviation excess)

• Check the connection between the external scale and

 

error

 

at full-closed control.

the driver. ￿

 

 

• Check that the variation of the motor position

 

 

 

 

protection

 

 

(encoder feedback value) and the load position

 

 

 

 

(external scale feedback value) is the same sign

 

 

 

 

when you move the load.￿

 

 

 

 

• Check that the numerator and denominator of the external

 

 

 

 

scale division (SV.Pr78, 79 and 7A) and reversal of

 

 

 

 

external scale direction (SV.Pr7C) are correctly set.

 

 

 

 

 

 

Over-speed

26

The motor rotational speed has exceeded the setup

• Do not give an excessive speed command.￿

 

protection

 

value of SV.Pr73 (Over-speed level setup)

• Make a gain adjustment when an overshoot has

 

 

 

 

occurred due to a poor gain adjustment.

 

 

 

 

 

When

*External

28

Communication error has occurred in data from the

• Separate the encoder cable and the motor cable if

scale com-

 

encoder. The data could be received normally, but an

they are bound together. ￿

munication

 

error occurred in the data due to noise.

• Connect the shield to FG...refer to wiring diagram.

in

data error

 

 

 

Trouble

 

 

 

 

protection

 

 

 

 

 

 

 

 

 

Deviation

29

Deviation counter value has exceeded 227 (134217728).

• Check that the motor runs as per the position com-

 

counter

 

 

mand.￿

 

overflow

 

 

• Check that the output toque has not saturated in

 

 

 

torque monitor.￿

 

protection

 

 

 

 

 

• Make a gain adjustment.￿

 

 

 

 

 

 

 

 

• Set up longer acceleration/deceleration time. Lower

 

 

 

 

the load and speed.

 

 

 

 

 

 

Software

34

The motor exceeded an allowable motor operation

Refer to P.170,"Software Limit Function" before using

 

limit ￿

 

range specified by SV.Pr26 (software limit setup)

this.￿

 

protection

 

against the position command input range.￿

￿

 

 

 

1)Gain has not matched up.￿

1)Check the gain (balance of position loop gain and ve-

 

 

 

￿

locity loop gain) and the inertia ratio.￿

 

 

 

2)Setup value of SV.Pr26 (Software limit setup) is small.

2)Setup a larger value to SV.Pr26. Otherwise, set

 

 

 

 

SV.Pr26 to “0” and disable the software limit protection.

 

 

 

 

 

 

<Remarks>

When the protective function with a prefix of "*" in the protective function table is triggered, you cannot clear with alarm clear input.

167

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Panasonic A4P Series Communi, Cation error, Data error, Position, Deviation, Excess, Hybrid, Over-speed, External, Counter