!
4-9SectionError Processing
104
2. Turn bit 04 of IR word n+1 ON and then OFF again.
SHIFT
CONT
#
1
B
0
A
1
B
0
A
4
E
MONTR
10104 10105
^OFF ^ ON
PLAY
SET
10104 10105
ON ^ ON
REC
RESET
10104 10105
OFF ^ ON
While the Clear Bit is ON, the default offset and gain values will be saved to
the Unit’s EEPROM when the Set Bit turns ON.
3. To finish the clearing of adjusted values, turn OFF bit 05 (the Clear Bit) of IR
word n+1.
SHIFT
CONT
#
1
B
0
A
1
B
0
A
5
F
MONTR
10105 10104
^ ON ^OFF
REC
RESET
10105 10104
OFF ^OFF
Caution Do not turn OFF the power supply or restart the Unit while the Set Bit is ON (data
is being written to the EEPROM). Otherwise, illegal data may be written in the
Unit’s EEPROM and “Special I/O Unit Errors” may occur when the power supply
is turned ON or when the Unit is restarted, causing a malfunction.
Note The EEPROM can be overwritten 50,000 times.
4-9 Error Processing
4-9-1 Troubleshooting Procedure
Use the following procedure for troubleshooting Analog Input Unit errors.
1, 2, 3... 1. Error occurs.
2. Is the ERROR indicator lit?
Yes: Error detected by Analog I/O Unit
(Refer to 4-9-2 Errors Detected by Analog I/O Unit.)
No: Go to the next step.
3. Is the RUN indicator lit?
Yes: Error detected by CPU Unit
(Refer to 4-9-3 Errors Detected by CPU Unit.)
Check whether the operation mode switch on the back of the Analog
I/O Unit is set correctly.
No: Refer to 4-9-5 Troubleshooting.
If both the ERROR and RUN indicators are lit, check whether the operation
mode switch on the back of the Analog I/O Unit is set correctly.
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