ABB Symphony Harmony Series, Instruction, Page: 213 / 402

8 - 8 WBPEEUI240751C0
I/O Block Problem Reports
Bad redun-
dancy link
channel A or B
(continued)
Device Problem in redundancy link con-
nection between primary and
backup I/O modules or redun-
dancy link hardware failure. 3. Replace the backup I/O module.
4. Stop primary by pressing the
stop/reset button once. Backup
should take over. Replace the pri-
mary I/O module.
5. Replace the base.
NOTE : The controller should be
online with a valid configuration
while replacing the I/O modules to
manage the failover.
Bad reference
status Device Input from onboard reference cir-
cuitry used for drift correction is
invalid. Replace the I/O module.
Block nonvola-
tile memory
failure Device Nonvolatile memory checksum or
write error. Initialize I/O block using special
operations switch (SW2). Refer to
Initialization
in Section 7 for pro-
cedures. If error persists, replace
the I/O module.
Calibration Channel I/O block is out of calibration. I/O
blocks are factory calibrated.
Replace the I/O module.
Channel
failure/out of
range Channel Overvoltage or undervoltage con-
dition exits for the indicated
channel.
1. Check configuration to verify
proper range selection.
2. Check channel jumpers to verify
proper configuration.
3. Check field wiring connections.
Cold junction
reference Device Input from internal or external cold
junction reference used for tem-
perature compensation is invalid. 1. Cold junction reference input
from RTD onboard I/O block failed.
Replace the I/O module.
2. External cold junction reference
input failed. Check external CJR,
field wiring, and connections.
Configuration
mismatch Device Some type of error exists in the I/O
block configuration in the
controller. Check the controller status. Cor-
rect any invalid input references,
data type conflicts, range errors,
etc.
Table 8-4. I/O Block Problem Reports
(continued)
Error Type Description Corrective Action