GAL GALaxy eHydro Manual page 123

GALaxy eHydro Elevator Controller
Table 6-0: Main CPU Faults
Faults
FVARS
Backup Tbl Err
FVARS Both Tbl
Chksum
Description
Field Variables Backup
Table Error. The field
variables from the
backup MRAM table
does not match the
variable read into
memory from the
main MRAM table.
Most likely, if this
error occurs, other
FVARS errors will
also occur.
Field Variables Both
Table Checksum Table
error. The verification
checksum for both the
main field variable
table and backup table
has failed. Field
Variable data is stored
in two separate
MRAM tables and a
checksum of each
table is stored in a
separate location.
When the system
powers up, the
checksum of each
table is verified. If one
table fails verification,
the field variables are
copied from the table
that passed
verification and then
both tables are
updated with valid
data. If both
checksum verifications
fail, data is copied
from the main table
and an error code is
displayed.
Section 6 – Main CPU Faults & Detailed Faults
Possible Cause/Suggested Fix
• A once-in-a-while occurrence of this error can be ignored
if it is not accompanied by the following errors: FVARS Both
Tbl Chksum error or FVARS Tbl Chksum Error.
• If either error occurs with this error, the main CPU board
should be replaced.
• If this fault occurs, replace the main CPU board.
6-59