YASKAWA VS-626M5 Instruction Manual download pdf (Page 58)

2-８

Chapter 2 SERVO

0715

□ EXCESS ERROR (SERVO OFF)

Position variation amount upon servo off was too large.

Comparing the values of the position variation amount upon servo off

(diagnosis “0007 PRD = 1, EBL = 0”) and the parameter “1806 SERVO OFF

POS ERR LIMIT,” when the position variation amount exceeds the set value,

the alarm occurs.

To release this alarm, turn the emergency stop switch on or off. However, the

parameter “1823 ERC = 1” or the position variation amount should be lower

than the set value.

The alarm can be cancelled by setting the parameter to “1815 SOC = 1.”

※ The cause of this alarm is a big movement of the spindle by an external

force or collision in servo off condition.

0730

□ PULSE COUNT MISS (ENC)

A count error occurred at the counter for position feedback of the encoder.

The amount of count error is displayed on the diagnosis “0012 PULSE COUNT

MISS.”

The alarm check function will be in effect after the completion of ref. point

return. The alarm check is overridden by setting the parameter to “1815 F1C =

1.”

To release the alarm, make the reset key ON.

Items Cause of Trouble How to Verify Measures

Parameter setting

error

Is the parameter No. 1824 zero pulse

with a correct value?

(Yaskawa servo: Standard 4)

Reset

The encoder of the

servo motor is

inferior.

Replace the motor

or encoder.

Count error by

noise

Verify the earth cable of the motor,

the shield of the encoder cable, etc.

Eliminate a root

cause.

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YASKAWA VS-626M5 Instruction Manual Page 58