Yaskawa J50M Instructions User Manual
Page 207
8-Segment LEDs (red)
Display
Indication (When Lit)
Base
breaking state
(No current through
motor)
I
Overcurrent detected
Circuit protector
trip detected
Abnormal regeneration
detected
Overvoltage detected
Overspeed detected
Undervoltage
detected
Overload detected
Heat sink overheat
detected
A/D error detected
A b n o r m a l M P U ( u n l i t )
of
power
circuit
in
pack is
i n t e r -
r u p t e d .
.
hold is
made
until
reset.
Relation
With
o u t p u t
Signals
Servo
alarm
output
7.5
MOLDED-CASE CIRCUIT BREAKERS
Those special housing type controls, with which
all the power sequence control circuits are
verted to the NC area, are sometimes provided
with MCBS which can be turned on and off exter-
nally.
Generally, when these MC CBS are turned off,
the power supply to the NC is stopped. For de-
tails , refer to the manual of the machine tool
builders.
7.6 TROUBLE CAUSES AND REMEDIES
7.6.1 ON-LINE SELF-DIAGNOSTICS
On-line self-diagnostics are implemented to locate
trouble quickly and protect the machine against
malfunctions. Shown below are the displaying functions
by the control being on-line and machinfng.
Display of three-digit alarm code including a
code showing an axis in error.
. Display of four-digit status code including a
function code showing M, S, T, F,
Input/output signal display
These displays can be made at any time, while
the machine is in automatic operation, or at stand-
b y .
7.6.2
ALARM CODES AND REMEDIES
or “A/B” on CRT screen is blinking
and the machine stops, depress the ALM key.
Then alarm code and message will be displayed
on CRT screen.
Alarm codes “800, ” “81 O,” “8?.0, ”
“830” and “840” are displayed as soon as the co-
rresponding error occurs.
For the remedies for trouble causes represented by
alarm codes, see APPENDIX Table A5.2 “LIST OF
ALARM CODES”.
7.6.3
SIGNALS
To clear up the causes indicated by alarm
codes, check the input
signals on
the
CRT screen.
Input /output signals
are
divided into standard
and custom-built
ones ,
and displayed
by
specify-
ing
the
corresponding diagnostic number with
keys on the
operator’s station.
Standard signals
are
included in
every type of
J50M. Custom-built
signals are provided for
high-voltage sequence control panel equipped with
some
of YASNAC controls.
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