The process of "alignment" consists in eliminating a systematic offset observed with a given sensor, around a specific operating point. This operation compensates for an error linked to the process. Therefore, replacing a module does not require a new alignment. However, replacing the sensor or changing the sensor's operating point does require a new alignment.
The alignment value is
editable from a programming console, even if program is in RUN Mode. For each input channel, you may:
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View and modify the desired measurement value,
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Save the alignment value,
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Determine whether the channel already has an alignment,
The alignment offset may also be modified through programming.
Channel alignment is performed on the channel in Standard operating mode, without any effect on the channel's operating modes.
Maximum offset between measured value and desired (aligned) value may no exceed 1500.
NOTE: The %IWr.m.c.1.0 = 1 bit confirms that the channel is now aligned.
