C.12 Self-Diagnostics
C.12 Self-Diagnostics
The drive has a built-in self-diagnosing function of the serial communication interface circuits. To perform the self
diagnosis function, use the following procedure.
DAN G ER!
E le c tric a l S h o c k Hazard. D o n o t c o n n e c t o r d is c o n n e c t w irin g w h ile the p o w e r is on. F a ilu re to c o m p ly w ill re s u lt in de a th o r
s e rio u s injury. B efo re servicing, d is c o n n e c t a ll p o w e r to th e equipm en t. The in te rn a l c a p a c ito r re m a in s c h a rg e d eve n a fte r the p o w e r
s u p p ly is tu rn e d off. The c h a rg e in d ic a to r LE D w ill e x tin g u is h w h en the D C b u s volta ge is b e lo w 5 0 Vdc. To p re v e n t e le c tric shock, w ait
a t le a s t o n e m in u te a fte r a ll in d ic a to rs are O F F a n d m e a s u re the D C b u s volta ge le v e l to confirm safe level.
1. Turn on the power to the drive.
2. Note the present terminal S6 function selection setting (H1-06) and set it for the communications test mode
(H1-06 = 67).
3. Turn off the power to the drive.
4. With the power off, wire the drive as shown in the following diagram, connecting terminals R+ and S+, R- and S-,
and S6 and SC.
5.
6.
7.
8.
9.
E(G) HC H1
H2 DM+ DM- IG
R+
R-
S+
S-
V+ AC
V-
A1
A2 FM AM AC P1
C1
P 2
C2
S1
S 2
S 3
S 4
S 5
S 6
S 7
S 8 SN S C S P
F ig u r e C .8 T e rm in a l C o n n e c t i o n s f o r C o m m u n ic a tio n S e lf - D ia g n o s t ic s
Set jumper S3 to source mode (internal power supply).
Turn the power to the drive back on.
During normal operation, the drive will display “PASS”. This indicates that the communications test mode is
operating normally.
When a fault occurs, the drive will display “CE” on the keypad display.
Turn off the power supply.
Remove the wire jumpers from terminal R+, R-, S+, S-, and S6-SC. Set back jumper S3 to its original position.
Set terminal S6 to its original function.
10. Return to normal operation.
YASKAWA ELECTRIC SIEP C710616 33D YASKAWA AC Drive L1000A Technical Manual
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