Panasonic MINAS A4P Series User Manual download pdf (Page 167)

167

[When in Trouble]

When in Trouble

Protective

function

Causes Measures

Error

code No.

Position

deviation

excess

protection

Deviation pulses have exceeded the setup of SV.Pr70

(Position deviation error level). 

1)The motor movement has not followed the command.



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

level) is small.



1)Check that the motor follows to the position

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

(invalid).

*Encoder

communi-

cation error

protection

Communication between the encoder and the driver

has been interrupted in certain times, and

disconnection detecting function has been triggered.

• Make a wiring connection of the encoder as per the

wiring diagram. Correct the miswiring of the

connector pins. Note that the encoder cable to be

connected to CN X6. (Check that the encoder cable

is not connected to the connector CN X7 for external

scale connection by mistake.)

•

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

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

encoder cables are long.

• Separate the encoder cable and the motor cable if

they are bound together.

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

the Connector, CN X6" of Preparation.

*Encoder

communi-

cation 

data error 

protection

Communication error has occurred in data from the

encoder. Mainly data error due to noise. Encoder

cables are connected, but communication data has

some errors.

*Hybrid

deviation

excess

error

protection

Position of load by the external scale and position of

the motor by the encoder slips larger than the setup

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

at full-closed control.

•

Check the connection between the motor and the load.

Check the looseness, slippage and backlash.

• Check the connection between the external scale and

the driver. 

• Check that the variation of the motor position

(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

protection

The motor rotational speed has exceeded the setup

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

• Do not give an excessive speed command.

• Make a gain adjustment when an overshoot has

occurred due to a poor gain adjustment.

*External

scale com-

munication

data error

protection

Communication error has occurred in data from the

encoder. The data could be received normally, but an

error occurred in the data due to noise.

• Separate the encoder cable and the motor cable if

they are bound together. 

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

Deviation

counter

overflow

protection

Deviation counter value has exceeded 2

(134217728).

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

mand.

• Check that the output toque has not saturated in

torque monitor.

• Make a gain adjustment.

• Set up longer acceleration/deceleration time. Lower

the load and speed.

Software

limit 

protection

The motor exceeded an allowable motor operation

range specified by SV.Pr26 (software limit setup)

against the position command input range.

1)Gain has not matched up.



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

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

this.



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

locity loop gain) and the inertia ratio.

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

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

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

with alarm clear input.

1 2 ... 162 163 164 165 166 167 168 169 170 171 172 ... 231 232

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Panasonic MINAS A4P Series User Manual Page 167

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