68
Adjusting Offset and Gain Section 2-7
5. To finish the gain adjustment, turn OFF bit 01 (the Gain Bit) of CIO word
n+1.
!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 “EEPROM Errors” may occur when the power sup-
ply is turned ON or when the Unit is restarted, causing a malfunction.
!Caution When making adjustments, be sure to perform both the offset adjustment and
gain adjustment at the same time.
Note 1. The EEPROM can be overwritten 50,000 times.
2. While the Offset Bit or the Gain Bit is ON, the present conversion data will
be displayed in word n+8.
If the Offset Bit or the Gain Bit is OFF, the value immediately prior to turning
the bit OFF will be held.
Clearing Offset and Gain
Adjusted Values
Follow the procedure outlined below to return the offset and gain adjusted val-
ues to their default settings.
The following example uses adjustment for illustration. (The unit number is 0.)
1,2,3... 1. Turn ON bit 05 (the Clear Bit) of CIO word n+1. (Hold the ON status.) Re-
gardless of the input value, 0000 will be monitored in CIO word n+8.
2. Turn bit 04 of CIO word n+1 ON and then OFF again.
SHIFT
CONT
#
2
C
0
A
0
A
1
B
0
A
1
B
MON
200101 ^ ON
RESET
200101 ^ OFF
SHIFT
CONT
#
2
C
0
A
0
A
1
B
0
A
5
F
MON
200105 ^ OFF
SET
200105 ^ ON
SHIFT
CONT
#
2
C
0
A
0
A
1
B
0
A
4
E
MON
200104 ^ OFF
SET
200104 ^ ON
RESET
200104 ^ OFF
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