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Section 4 Software Interface
<Offset/gain adjustment procedure>
Offset is adjusted first.
1) Input “30000” to the parameter setting request register to activate the parameter mode. (Make sure that the status register
is “30001”.)
2) Set ON bit 7 of the parameter type setting register to activate offset/gain adjustment mode.
3) Set ON the bit for the channel to be adjusted (the corresponding bit of bits 12 or 13 of the parameter type setting register).
(The “SETTING” LED of the module blinks.)
4) With an external device, etc. connected to the terminal of the channel that is to be adjusted, observe the output voltage or
current value.
5) First, in the condition that bit 15 of the parameter setting data register (offset address +7) is set OFF, adjust output value by
setting ON and OFF bit 4 (output value Down) and bit 5 (output value Up).
6) After the completion of offset adjustment, set ON bit 0 (zero) of the parameter setting data register (offset address +7) to
write the offset adjustment value in the module internal EEPROM. When bit 0 (zero) of offset address +2 is set ON, the
writing of EEPROM is completed. After confirming this, set OFF bit 0 (zero) of the parameter setting data register (offset
address +7).
7) Then set bit 15 ON of the parameter setting data register (offset address +7) and, in the same way as offset adjustment,
adjust output value by setting ON and OFF bit 4 (output value Down) and bit 5 (output value Up). (Gain adjustment)
8) After the completion of gain adjustment, set ON bit 0 (zero) of the parameter setting data register (offset address +7) to
write the gain adjustment value in the module internal EEPROM. Confirm the completion of EEPROM writing, in the same
way as explained for offset adjustment.
9) Set OFF all the bits of the parameter type setting register, and clear all the bits of the parameter setting data register to zero.
This completes the adjustment work.
4-3 Analog Input/Output Module
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