ABB Symphony Harmony Series, Instruction, Page: 212 / 402

I/O Block Problem Reports
WBPEEUI240751C0 8 - 7
Table 8-4. I/O Block Problem Reports
Error Type Description Corrective Action
Backup I/O
module error Device Problem with the backup I/O mod-
ule. Backup will not be able to take
over if there is a problem with the
primary. 1. Reset the backup I/O module.
2. Check the condition of the com-
munications connector (P5) on the
I/O module. If bad, replace the I/O
module.
3. Check redundancy link connec-
tor pins (P4) on the backup I/O
module. If bad, replace the I/O
module.
4. Replace the backup I/O module.
5. Replace the base.
Bad field power
status Device IFP or LFP power problem. Refer to Table 8-2 for power prob-
lem corrective actions.
Bad Hnet
channel A or B Device No communication on the indi-
cated Hnet channel. 1. Reset the I/O module.
2. Check the condition of the com-
munications connector (P5) on the
I/O module. If bad, replace the I/O
module.
3. Check the condition of the
mounting column connector. If
bad, replace the mounting column.
4. If problem persists, replace the
I/O module.
Bad power
input A or B Device BLP power problem for the indi-
cated power input. Refer to Table 8-2 for power prob-
lem corrective actions.
Bad readback
status Channel Expected output and actual output
are different.
1. Check DOT-120 block readback
fuses.
2. Failure in the readback circuitry.
Replace the I/O module.
3. Failure in the I/O channel cir-
cuitry. Replace the I/O module.
Bad redun-
dancy link
channel A or B Device Problem in redundancy link con-
nection between primary and
backup I/O modules or redun-
dancy link hardware failure. 1. Reset the I/O modules.
2. Check redundancy link connec-
tor pins (P4) on primary and
backup I/O modules. If bad,
replace the I/O module.