Electrical
Troubleshooting Guide
IRB6400 M94A
Page 2 - 16
Computer System
System Board DSQC 256A (Cont)
The DSQC 256A System board controls and reads the
dual operation chain. Its status is also indicated by
LEDs on the front of the board.
The board has, in addition, three sensor inputs for
inductive sensors. These inputs are scanned more
often then standard inputs for faster response times.
The temperature of the motors are monitored by PTC
(Positive Temperature Coefficient) inputs to the board.
The resistance of a PTC is approximately 120 Ohms at
room temperature. If the motors gets extremely hot, this
resistance will go high.
For troubleshooting procedures refer to the Motors ON
chapter in this manual.
If
replaced
, there are no adjustments or procedures
required.
Sheet 7 ..........................
Sheet 8 ..........................
Sheet 8, line 01 ..............
Sheet 13.1, line 6............
A5
A6
G S
A7
A 8
ES
A9
A 10
KM1
DRIVE
S YSTEM
M
E N ABL IN G
DEV ICE
A1
A2
MS
MA NUAL
RE DUCED
F ULL
AUTO
A3
A 4
A S
24 V d c
A11
A 12
L IM 1
263 Vac
X 3
COM PU TE R ENA BLE
CO M P UT ER MO T ORS O N
K M 3 RE LA Y
B 5
B 6
B 7
B8
2 4 Vdc
B9
B1 0
E NA BLING
DE VIC E
B1
B2
B 3
B4
0 V
B 11
B1 2
KM2
A X IS 1 OVE R TRA V EL
P END ANT E -ST O P
CO NTR OL E -ST OP
K E YSW I TC H
SY STEM
BO AR D
RUN CHAIN 1
RUN CHAIN 2
L IM 2
FU 4
F U3
FU 3 = 1.6 AM P
F U4 = 1.6 AM P
0 V
24 V
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