Omron M1 Series User Manual page 744

9 Troubleshooting
9-1-2
Alarm Code List
Alarm
Alarm
sub-
code
code
1
(Cof)
(dbA)
0
(dbH)
0
9-4
Name Description
(1) Current input com-
mand disconnection
Current input
(2) Strong noise re-
terminal
ceived from surrounds
AI2(AII) signal
disconnection
Error in braking resistor
connection terminal wir-
ing
Braking transis-
tor error
The braking transistor
is damaged.
(1) High braking load
Braking resistor
(2) Short deceleration
overheat
time
Check point and remedy reference
Check that current input terminals AI2(AII)*
are receiving current.
→ Terminal AI2(AII) disconnection detec-
tion "Subcode: 1"
Check measures against noise (grounding
conditions, signal wiring and communication
cable/main circuit wiring and installation
methods, etc.)
→ Strengthen measures against noise.
→ Separate main circuit wiring and control
circuit wiring as much as possible.
Check that the braking resistor is correctly
wired in to the [P+] and [DB] terminals on the
main circuit terminal block.
Check that the motor wiring is not erroneous-
ly connected to the terminal [DB].
→ If there is no miswiring, request repair
of the inverter.
Check that the braking resistor value is cor-
rect, and that it is not miswired.
→ If there is no problem, request repair of
the inverter.
Re-calculate the relationship between brak-
ing load calculations and braking capacity.
→ Reduce braking load.
→ Review braking resistor selection, and
increase braking capacity.
(Resetting of parameters F50, F51, F52
data is necessary)
Recalculate deceleration torque and deceler-
ation time required from the moment of iner-
tia of the load and deceleration time.
→ Lengthen deceleration time (parame-
ters F08, E11, E13, E15, H56)
→ Review braking resistor selection, and
increase braking capacity.
(Resetting of parameters F50, F51, F52
data is necessary)
M1 Series Standard Type User's Manual (I669)