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Adjusting Offset and Gain Section 5-7
5-7 Adjusting Offset and Gain
5-7-1 Adjustment Mode Operational Flow
The adjustment mode enables the output of the connected devices to be cali-
brated.
This function adjusts the output voltage according to the offset value and gain
value at the input device, and sets the settings values at the Unit at that time
to 0000 and 0FA0 (07D0 if the range is
±10 V) respectively.
For example, suppose that the specifications range for the external input
device (e.g., indicator, etc.) is 100.0 to 500.0 when using in the range 1 to 5 V.
Also, suppose that when voltage is output at the Analog Output Unit at a set
value of 0000, the external input device actually displays 100.5 and not 100.0.
It is possible to make settings to adjust the output voltage (making it smaller in
this case) so that 100.0 is displayed and to make 0000 (not FFFB as in this
case) the set value for which 100.0 is displayed.
Similarly for gain values, suppose that when voltage is output at the Analog
Output Unit at a set value of 0FA0, the external input device actually displays
500.5 and not 500.0. It is possible to make settings to adjust the output volt-
age (make it smaller in this case) so that 500.0 is displayed and to make 0FA0
(not 0F9B as in this case) the set value for which 500.0 is displayed.
External input device
display
Set value before
adjustment (word n+8)
Set value after
adjustment
100.0 FFFB (FFF0) 0000 (0000)
500.0 0F9B (1F36) 0FA0 (1F40)
(Values in parentheses are for a resolution of 8,000.)
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