ABB AC500-S Safety User Manual page 28

Overview of AC500-S Safety PLC
Troubleshooting
ID Behaviour
11. Set "Enable debug" param-
n
eter to "OFF" on SM560-S
n Create boot projects for
SM560-S and PM5xx
n Execute powering off/on
n Go to CoDeSys Safety and
compare boot project CRCs
on your PC and SM560-S.
The comparison shows that
they are the same, which is
OK.
n Try to create a boot project
for SM560-S. An error mes-
sage follows because of
"Enable debug" set to
"OFF" for SM560-S, which
is OK.
n Repeat the comparison of
boot project CRCs on your
PC and SM560-S. They are
reported to be not equal
now (boot project CRC for
SM560-S is shown as
CDCDCDCD), which can
be misleading since the
boot project on SM560-S
was not changed.
12. The serial driver is used to con-
nect to SM560-S Safety CPU.
One executes "Login" com-
mand shortly followed by
"Logout" command in CoD-
eSys Safety and shortly after
this the "Login" command is
again executed. After second
login attempt, the communica-
tion error is shown in CoDeSys
Safety.
28
Potential Cause
CoDeSys Safety does not sup-
port the described use case.
The serial driver does not have
enough time to be re-initialized.
AC500-S
Remedy
After powering off/on of SM560-
S Safety CPU, the correct boot
project CRC shall be shown for
SM560-S.
Wait for at least 20 seconds
before executing "Login" com-
mand after "Logout" was per-
formed.
30.03.2017