C.12 Self-Diagnostics
YASKAWA ELECTRIC
TOEP C710656 10B YASKAWA Power Regenerative Unit - R1000 Instruction Manual
187
MEMOB
US/Modb
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Commu
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C.12 Self-Diagnostics
The regenerative unit has a built-in self-diagnosing function of the serial communication interface circuits. To perform
the self-diagnosis function, use the following procedure.
DANGER!
Electrical Shock Hazard. Do not connect or disconnect wiring while the power is on. Failure to comply will result in death or
serious injury. Before servicing, disconnect all power to the equipment. The internal capacitor remains charged even after the power
supply is turned off. The charge indicator LED will extinguish when the DC bus voltage is below 50 Vdc. To prevent electric shock, wait
at least one minute after all indicators are OFF and measure the DC bus voltage level to confirm safe level.
1.
Turn on the power to the regenerative unit.
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 regenerative unit.
4.
With the power off, wire the regenerative unit as shown in
, connecting terminals R+ and S+, R- and
S-, and S6 and SC.
Figure C.7
Figure C.7 Terminal Connections for Communication Self-Diagnostics
5.
Set jumper S3 to source mode (internal power supply).
6.
Turn the power to the regenerative unit back on.
7.
During normal operation, the regenerative unit will display “Pass” to indicate that the communications test mode
is operating normally.
When a fault occurs, the regenerative unit will display “CE” on the keypad display.
8.
Turn off the power supply.
9.
Remove the wire jumpers from terminal R+, R-, S+, S-, and S6-SC. Reset jumper S3 to its original position and
set terminal S6 to its original function.
10.
Return to normal operation.
A – Terminal Block (TB 5)
C – Terminal Block (TB 2)
B – Terminal Block (TB 1)
IG
R+
R−
S+
S−
E(G) FM AC AM P1 P2 PC SC
MA MB MC
M1 M2 E(G)
S1 S2 S3 S4 S5 S6 S7 S8
SC A1 A2 A3 +V AC -V
A
C
B
YEC
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