Error Messages and Alarm Outputs
Section 5-1
5-1 Error Messages and Alarm Outputs
When an error occurs after operation has once started, an error code is set in
Word A400. If two or more errors occur simultaneously, the error code having the
highest priority is set. In the following table, the error having the highest priority is
shown at the top of each column.
The status of indicators for which status is not show does not affect the error con
-
dition.
Startup Errors
Item
Cause
CPU indicators
Peripheral
Device error
message
Power RUN ERROR WDT ALARM OUT INT COMM
Start input wait START input of
CPU Rack Power
Lit
Unlit ---
---
---
---
---
CPU WAITING
Supply Unit is OFF.
No SYSMAC
BUS terminator set.
Terminator is not
Lit
Lit
Unlit ---
Unlit ---
---
---
---
---
---
---
---
---
CPU WAITING
CPU WAITING
CPU Bus Unit
initialization
Terminator of
SYSMAC BUS/2 is
missing, or CPU
Bus Unit is still
initializing.
I/O verify error
(PC Setup)
I/O Unit has been
removed.
Lit
Unlit ---
---
Lit
---
---
CPU WAITING
Startup Errors (cont’d)
Item
RUN
Auxiliary Area data
Corrective action
output Error flags
Error
code
Start input wait
OFF
OFF
A30600 ON None
Turn ON the CPU Rack Power Supply Unit START
input, or short-circuit the START input terminals.
No SYSMAC BUS
terminator
A30602 ON None
Turn on the power to the Remote I/O Slave Unit.
Specify the Unit connected last as the terminator or wait
until CPU Bus Units complete initialization.
CPU Bus Unit initialization OFF
A30603 ON None
Turn on the power to the Remote I/O Slave Unit.
Specify the Unit connected last as the terminator.
I/O verify error
(PC Setup)
OFF
A30601 ON 00E7
A40209 ON
Verify the I/O table. Correct the table if necessary by
create a new one.
76
OMRON [ OMRON ELECTRONICS LLC ]
