Controller Errors - ABB Symphony Harmony Series Instruction

Error Indications and Corrective Action
Table 5-1. Status LED Indications and Correction Actions
LED State Indication
Off I/O module not enabled Dipshunt not properly
(continued)
No power to I/O module Module not completely
Red Bus fault timer error
(fail) (time-out)

Controller Errors

The controller performs status checks on the I/O module. An
error will appear in the report function of a human system
interface. Refer to the appropriate instruction manual for the
human system interface you are using for an explanation of
these reports.
FC 79 output block N+9 in the controller configuration is the
I/O module status flag (logic zero=good; logic one=bad). Use a
human system interface to monitor this block. If the status
flag is a logic one, check the front panel module status LED
and the human system interface report function to determine
corrective actions.
The controller generates an analog input reference error if the
Analog input
I/O module reference voltages (1 VDC and 5 VDC) used to
reference error
5 - 2
Probable Cause
installed between MFP
and I/O module
MFP configuration is not
correct
inserted in the module
mounting unit
I/O expander bus clock
failure
Dipshunt not installed
between MFP and I/O
module
NOTE: If FC 79 specification S19 is set to zero, the controller will trip when the
I/O module fails or the analog input reference voltages are out of tolerance.
Changing specification S19 to a one will allow the controller to continue to
operate if any I/O module error condition exists.
(continued)
Corrective Action
Verify dipshunt is installed prop-
erly (no bent pins) in I/O
expander bus socket on module
mounting unit backplane
between MFP and I/O module
Verify FC 79 is in MFP
configuration
Verify module is completely
inserted in the module mounting
unit: faceplate flush with mod-
ule mounting unit and captive
retaining screws latched
Check MFP for proper operation
Verify dipshunt is installed in the
I/O expander bus socket on the
module mounting unit backplane
between MFP and I/O module
WBPEEUI240769B0