Yaskawa YASNAC PC NC Maintenance Manual Uživatelský manuál stáhnout pdf (Strana 26)

Chapter 4: Troubleshooting PC NC Maintenance Manual

4-5

(2) Alarm Numbers 2061 to 2068 (Reference Point Return Area

Error)

(3) Alarm Numbers 2071 to 2078, 2081 to 2088 (Reference Point

Return Position Error)

Table 4.3: Troubleshooting - Alarm #2061 ~ 2068 (Reference Point Return Area Error)

Cause Check Item Countermeasures

The reference

point return start

point is at the

zero point side

of the decelera-

tion limit switch.

Deceleration limit switch (DECLS)

If reference point return is started from a point

located at the reference point side of DECL (point

C) as shown below, an alarm occurs.

Note: This error check is not made before the

execution of manual reference point

return after the power is turned ON.

Return the axis to a position on

the deceleration LS or away

from it and, then execute refer-

ence point return once again.

Approach

feedrate is too

fast.

Compare the setting for the approach feedrate

parameter with the parameter list.

Change the setting for param-

eters pm2521 to pm2525 to an

appropriate value.

Table 4.4: Troubleshooting - Alarm Numbers 2071 ~ 2078, 2081 ~ 2088

(Reference Point Return Position Error)

Cause Check Item Countermeasures

Alarm in manual reference

point return operation

Determine whether the error occurs every

time.

Contact a Yaskawa customer

service representative.

Alarm in automatic reference

point return operation

G28: Determine whether the alarm

occurs every time.

Contact a Yaskawa customer

service representative.

G27: Check the point specified in the

program to determine whether it

agrees with the zero point.

Review the program.

#3073 DO (1st axis)

#3073 D1 (2nd. axis)

#3073 D2 (3rd axis)

#3073 D3 (4th axis)

#3073 D4 (5th axis)

Execute reference

point return again

while observing the

I/O signal monitor

screen

1 2 ... 21 22 23 24 25 26 27 28 29 30 31 ... 300 301

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