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2-6
Section
Offset and Gain Adjustment
27
2-6
Offset and Gain Adjustment
This function is designed to calibrate inputs depending on the devices to be con-
nected.
2-6-1 Adjustment Mode Operational Flow
The following diagram shows the flow of operations when using the adjustment
mode for adjusting offset and gain.
Change the operation mode switch on the back of the Unit
Power up the PC
When adjusting another input number
When adjusting the same input number
Set the input number
Offset adjustment (Refer to page 28)
Offset Bit ON
(Bit 0 of IR word n+1 turns ON.)
Sampling input
(Add inputs so that conversion
value becomes 0.)
Set Bit ON
(Bit 4 of IR word n+1 turns ON.)
Turn off power to the PC
Change the operation mode switch on the back of the Unit
Set the operation mode switch to normal mode.
Set the operation mode switch to adjustment mode.
The RUN indicator will flash while
in adjustment mode.
Write the input number to be adjusted
in the rightmost byte of IR word n.
Gain adjustment (Refer to page 30)
Gain Bit ON
(Bit 1 of IR word n+1 turns ON.)
Sampling input
(Add inputs so that conversion
value is maximized.)
Set Bit ON
(Bit 4 of IR word n+1 turns ON.)
Refer to
2-6-2 Offset and Gain
Adjustment Procedures
Caution
Be sure to turn off the power to the PC before changing the operation mode
switch.
If the I/O table is registered in the PC, an I/O setting error may occur, not allowing
any adjustment. In such a case, either cancel the I/O table or create the I/O table
again.
When making adjustments, be sure to perform both the offset adjustment and
gain adjustment.
