!
4-8SectionOffset and Gain Adjustment
103
5. Check the 10V/5V/20mA output, and then turn bit 04 (the Set Bit) of IR word
n+1 ON and then OFF again.
SHIFT
CONT
#
1
B
0
A
1
B
0
A
4
E
MONTR
10104 10102 c108
^OFF ^ OFF 0F9F
PLAY
SET
10104 10102 c108
ON ^ OFF 0F9F
REC
RESET
10104 10102 c108
OFF ^ OFF 0F9F
While the Gain Bit is ON, the gain value will be saved to the Unit’s EEPROM
when the Set Bit turns ON.
6. To finish the gain adjustment, turn OFF bit 01 (the Gain Bit) of IR word n+1.
SHIFT
CONT
#
1
B
0
A
1
B
0
A
1
B
MONTR
10101 10104
^ ON ^OFF
REC
RESET
10101 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.
When making adjustments, be sure to perform both the offset adjustment and
gain adjustment.
Note The EEPROM can be overwritten 50,000 times.
Follow the procedure outlined below to return the offset and gain adjusted val-
ues to their default settings.
The following example uses output number 1 adjustment for illustration. (The
unit number is 0.)
1, 2, 3... 1. Turn ON bit 05 (the Clear Bit) of IR word n+1. (Hold the ON status.) Regard-
less of the set value, 0000 will be monitored in IR word n+8.
SHIFT
CONT
#
1
B
0
A
1
B
0
A
5
F
MONTR
10105
^OFF
PLAY
SET
10105
ON
Clearing Offset and Gain
Adjusted Values
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