KFAS: Fanuc CNC Parts, Service, & Repair

       

Fanuc 0 CNC Status Display and Details of Diagnostics


The status of the CNC can be monitored at all times.
Press the DGNOS button to display the contents of the following diagnostics:

Fanuc Diagnostics 27, DGN 27
No.    #7        #6        #5        #4        #3        #2        #1        #0
27                                        PCS    ZRN4  ZRN3     ZRN2  ZRN1

PCS: 0: The spindle position coder one revolution signal is off. 
         1: The spindle position coder one revolution signal is on.
ZRN4-1 0: The pulse coder one revolution signal for 1 - 4 axis is off.
              1: The pulse coder one revolution signal for 1 - 4 axis is off.


Fanuc Diagnostics 700, DGN 700
No    #7         #6         #5         #4         #3         #2         #1         #0
700             CSCT    CITL     COVZ     CINP   CDWL    CMTN   CFIN

When these bits are = 1, they mean the following:
CSCT:   The CNC is waiting for the spindle constant speed reached signal.
CITL:     The Interlock signal is on.
COVZ:   The override is set to 0%.
CINP:     In-position check is being made.
CDWL:   A dwell command is being executed.
CMTN:   A tool movement command is being executed in automatic operation.
CFIN:     The M, S, or T function is being executed.


Fanuc Diagnostics 701, DGN 701
No.    #7         #6         #5         #4         #3         #2         #1         #0
701                             CRST                                         CTRD   CTPU

When these bits are = 1, they mean the following:
CRST: An emergency stop, external reset, reset and rewind, or a reset button on the 
            MDI panel is on.
CTRD: Data is being input through the RS232 interface.
CTPU: Data is being output through the RS232 interface.


Fanuc Diagnostics 702, DGN 702
No.    #7         #6         #5         #4         #3         #2         #1         #0
702  STP     REST     EMS     RRW     RSTB                             CSU

#7    #6    #5    #4    #3    #2    #1    #0         Cause

1       1      1      0      0                      1         Emergency stop is applied

1       1      0      0      0                      0         An external reset signal was applied

1       1      0      1      0                      0         A reset and Rewind signal was applied

1       1      0      0      1                      0         The reset button was pressed

1       0      0      0      0                      1         A servo alarm occurred

1       0      0      0      0                      0         A feed hold signal was applied, or the mode was switched

Fanuc Diagnostics 712, DGN 712
This diagnosis information is valid only if automatic operation is terminated when it should not be.
The information indicates the reason why the cycle start lamp (STL) is off.

No.    #7         #6         #5         #4         #3         #2         #1         #0
712  STP     REST     EMS     RRW     RSTB                             CSU

#7  #6  #5  #4  #3  #2  #1  #0 
1    1    1   0    0    0    0   1    The emergency stop signal (*ESP) was input. 
1    1    0   0    0    0    0   0    The external reset (ERS) signal was input. 
1    1    0   1    0    0    0   0    The reset & rewind (RRW) signal was input. 
1    1    0   0    1    0    0   0    The MDI reset button was pressed. 
1    0    0   0    0    0    0   1    A servo alarm occurred. 
1    0    0   0    0    0    0   0    The feed hold (*SP) signal was input, or manual mode was selected. 
0    0    0   0    0    0    0   0    The machine stopped in a single block. 

All these bits are cleared to 0 when the power is switched on.


The details of servo alarm 4x4 are provided by the following DGN,

in the order of X- through eighth axis. Example: 720=X axis, 721=Y axis, 722=Z axis, etc…

Fanuc Diagnostics 720, DGN 720
No.    #7        #6        #5        #4        #3        #2        #1        #0
720  OVL       LV     OVC   HCAL     HVAL   DCAL  FBAL   OFAL

OVL: An overload alarm occurred.
            The thermal overload has operated. Either an overheat has occurred, the thermal device has defected,
            or the cable is broken. Please check DGN 730 for motor or amplifier overheat.

LV: A low voltage alarm has occurred. Either the input voltage is low or the MCC is defective.

OVC: An overcurrent alarm has occurred. Please check cutting conditions, motor 
            current waveform or digital servo parameter.
HCAL: An abnormal current alarm has occurred. Please check the transistor module of 
            the amplifier or the servo motor for short.
HVAL: An overvoltage alarm has occurred. Please check the input voltage, 
            regenerative circuit or servo motor.
DCAL: A regenerative discharge alarm has occurred. Please check the connection of 
             the discharge unit, condition of discharge transistor or amount of acc/dec.
FBAL: A disconnect of the pulse coder has occurred. A defective pulse coder or wire 
            break may cause the alarm. Also, please check the parameter for setting of feedback type or shield of the cable.
OFAL: An overflow alarm has occurred. Incorrect parameter of the digital servo is most 
            possible cause.


Fanuc Diagnostics 730, DGN 730
No.         #7         #6         #5         #4         #3         #2         #1         #0
730         ALD                             EXPC

                    ALDF     EXPC         Details

OVL Alarm     1             0             Overheat detected at the Motor

                     0              0             Overheat detected at the amplifier

FBAL Alarm   1              0             Disconnect detected by hardware

                     0              0             Disconnect detected by software

                     1              1             Separate pulse coder detected by software.



The details of a serial pulse coder Alarm 319, 329, 339, 349 are indicated by the following diagnostics:

Fanuc Diagnostics 760, DGN 760
No.        #7        #6        #5        #4        #3        #2        #1        #0
760    SFLG   CSAL     BLAL  PHAL   SCAL   BZAL    CKAL   SPHAL

SFLG: This is not an alarm bit. It is set = 1 when serial pulsecoder is used.
CSAL: A check sum alarm occurred. The serial pulsecoder is defective.
BLAL: A low battery voltage alarm has occurred. Please replace the battery.
PHAL: An abnormal phase data alarm has occurred. Either the pulsecoder is defective 
or the cable is faulty.
SCAL: An abnormal rotation speed count alarm has occurred. The pulsecoder is 
defective.
BZAL: A battery zero alarm has occurred. The pulsecoder is powered for the first time. 
Please check that the battery is properly connected and perform a zero return.
CKAL: A clock alarm occurred. Replace the pulsecoder.
SPHAL: An abnormal software phase detect alarm has occurred. Either the pulsecoder 
or cable is faulty.


Fanuc Diagnostics 800, DGN 800
No.    SVERR
800
The amount of position following error is displayed.

Fanuc Diagnostics 820, DGN 820
No.    ABSMT 
820
The machine position is displayed.

Fanuc-0 DGN 0104 Diagnostics 0104

images/Fanuc 0 DGN-0120 Diagnostics 0120

images/Fanuc-0 DGN-0122 Diagnostics 0122

Fanuc-0 DGN-0128 Fanuc Diagnostics 0128

Fanuc-0 DGN-0712 Diagnostics 0712

     

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