Mitsubishi MELSEC Q Series User Manual page 19

1 OVERVIEW
(7) Changing the input range
(8) A/D conversion system
(9) Input signal error detection function
(10) Warning output
(11) Online module change
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The input range can easily be set from the GX Developer.
1: Input range refers to the type of offset/gain settings. The most frequently
used range is set as the default but the user can also set the offset/gain.
There are the following five A/D conversion systems.
(a) Sampling processing
Analog input values are converted into digital values one by one on a
channel basis and the digital output value is output at every conversion.
(b) Averaging processing
1) Time averaging
A/D conversion is averaged in terms of time on a channel basis and a
digital average value is output.
2) Count averaging
A/D conversion is averaged in terms of count on a channel basis and a
digital average value is output.
3) Move averaging
The specified number of digital output values measured per sampling
time are averaged.
(c) Primary delay filter
A digital output value is smoothed according to the preset time constant.
The voltage/current outside the setting range is detected.
There are the following two warning outputs.
(a) Process alarm
A warning is output if a digital output value falls outside the setting range.
(b) Rate alarm
A warning is output if the varying rate of a digital output value falls outside
the preset varying rate range.
The module can be replaced without stopping the system.
Using a sequence program further enables the following (limited to same model
pairs, though).
• Inheritance of offset/gain values to the A/D converter module after online module
change.
• Transfer of offset/gain values to a different A/D converter module mounted on
another slot.
MELSEC-Q
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