Omron ZEN Quick Manual page 38

8 Troubleshooting
Error message
I/O BUS ERR
MEMORY ERR
I2C ERR
Error message Cause
M/C ERR Error in the cassette program
OMRON ELECTRONICS, S.A.
Error at power ON or during execution
Cause
Connection error in the I/O
expansion unit
Program error
Communication error
between Memory and RTC
Error during program transfer from Memory Cassette
Note. Use ZEN Support Software to read the error messages for LED-type
CPUs.
ZEN Programmable Logic Module
Possible solution
Switch off the power supply and check
that the expansion unti is connected
correctly.
Execute the 'All Clear' operation and
rewrite the program.
Press any key and clear the error.
Possible solution
Save the error-free program on the
cassette
Page 38