Omron SYSMAC C200H-AD003 Operation Manual page 42

Offset and Gain Adjustment
Caution
!
Gain Adjustment
1, 2, 3...
30
While the Offset Bit is ON, the offset value will be saved to the Unit's EE-
PROM when the Set Bit turns ON.
5. To finish the offset adjustment, turn OFF bit 00 (the Offset Bit) of IR word
n+1.
CONT B
SHIFT
1
#
REC
RESET
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.
The procedure for adjusting the analog input gain is explained below. As shown
in the following diagram, the gain is adjusted by sampling inputs so that the con-
version value is maximized.
Input signal range:
0 to 10 V
The following example uses input number 1 adjustment for illustration. (The unit
number is 0.)
1. Turn ON bit 01 (the Gain Bit) of IR word n+1. (Hold the ON status.)
CONT B
SHIFT
1
#
PLAY
SET
The analog input's digital conversion values while the Gain Bit is ON will be
monitored in IR word n+8.
A B A A
0 1 0 0
10100 10104
^ ON
10100 10104
0FA0
0
A B A B
0 1 0 1
10101
^OFF
10101
Section
MONTR
^OFF
OFF ^OFF
Gain adjustment input range
10 V
MONTR
ON
2-6