ABB OmniCore V400XT Product Manual page 379

Troubleshooting procedure
The troubleshooting table is supposed to be used as a detailed instruction together
with the troubleshooting flowchart.
1
2
3
4
5
Product manual - OmniCore V400XT
3HAC081697-001 Revision: A
Tip
In setups with several additional drive units:
• Measure voltage on the last unit in the chain first, and then work your way
backwards.
• Check if the FlexPendant indicates which unit is faulty. If not, replace one
unit at a time.
Action
Power on the controller. Check the
Module Status LED (A) on the addi-
tional drive unit.
Measure the 24V_BRAKE input at
connector X13/X14.
Check the two Link/Activity LEDs
(B & D). These LEDs indicate the
communication status of the mod-
ule.
Check the connectors at T41.X1
(24V SYS DRV IN) and T41.X2 (24V
SYS DRV OUT). Make sure that the
power cables are connected prop-
erly at both ends.
Check the EtherCAT/SMB cables
X3/X4/X16/X18. Make sure that the
cables are connected properly at
both ends.
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7.3.4 Troubleshooting the additional drive unit
Note
Make sure that the additional drive unit is oper-
ational.
Wait at least 1 min after power-on.
If the Module Status LED is:
• Off: The additional drive unit is in the
power off state. Proceed with step 4.
• Flashing red (~ 1Hz): Firmware error or
self-test failure.
Upgrade the firmware. If the problem
persists, the additional drive unit may be
faulty, see Replacing the additional drive
unit on page 264.
• Flashing green (~ 1Hz): Communication
error to another module. Proceed with
step 3.
Verify that the input to X13/X14 is 24 VDC ±
10%.
• If the measured voltage is normal, pro-
ceed with step 5.
• If the measured voltage is abnormal,
proceed with step 11.
Make sure that the drive unit is operational.
If the Link/Activity LED is:
• Yellow, steady: The communication link
is established. The drive unit may be
faulty, see Replacing the additional drive
unit on page 264.
• Flashing yellow: The communication link
is established and data is transferred
through the port. Proceed with step 2.
• Off: The EtherCAT link is not established.
Proceed with step 5.
If the connection and cable seem OK, proceed
with step 6.
If there is a problem with the connection, pro-
ceed with step 7.
If the connection seems OK, proceed with step
6.
If there is a problem with the connection, pro-
ceed with step 9.
7 Troubleshooting
Continued
Continues on next page
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