Omron ZEN Operation Manual page 141

Error Messages
Error at Power ON or During Operation
Error message
I/O BUS ERR
MEMORY ERR
I2C ERR
Error During Program Transfer from Memory Cassette
Error message
M/C ERR
Note
Display function (D):
• For AC power supply types, analog-converted values (I4/I5 or Ia/
Ib) are specified as the displayed items.
• For LED-type CPU Units, the date (DAT), day/month (DAT1), and
time (CLK) are specified as the displayed items.
Probable cause
Expansion I/O Unit
connection error.
Program error.
Communications error
between Memory and
RTC.
Probable cause
Memory cassette
program error.
Use the ZEN Support Software to read error messages for LED-
type CPU Units.
Possible solution
Turn OFF the power supply and check that
the Expansion I/O Unit is connected
properly.
Execute the All Clear operation and then re-
write the program.
Press any operation button and clear the
error. Replace the CPU Unit if the error
occurs frequently.
Possible solution
Save the error-free program to the Memory
Cassette again.
Section 6-2
117