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Adjusting Offset and Gain Section 7-9
5. Check the 0-V/1-V/4 mA output, and then turn bit 04 (the Set Bit) of CIO
word n+1 ON and then OFF again.
While the Offset Bit is ON, the offset value will be saved to the Unit’s EE-
PROM when the Set Bit turns ON.
6. To finish the offset adjustment, turn OFF bit 00 (the Offset 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 The EEPROM can be overwritten 50,000 times.
Gain Adjustment The procedure for adjusting the analog output gain is explained below. As
shown in the following diagram, the set value is adjusted so that the analog
output is maximized (to 10 V/5 V/20 mA).
SHIFT
CONT
#
2
C
0
A
0
A
1
B
0
A
4
E
MON
200104 ^ OFF
SET
200104 ^ ON
RESET
200104 ^ OFF
SHIFT
CONT
#
2
C
0
A
0
A
1
B
0
A
0
A
MON
200100 ^ ON
SET
200100 ^ OFF
10 V
0
0FA0
Output signal range:
0 to 10 V
Gain adjustment output range
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