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MELSEC-Q
1 OVERVIEW
1
1 OVERVIEW
This User's Manual describes the specifications, handling and programming methods
for the Q64AD analog-digital converter module (hereinafter referred to as the Q64AD),
Q68ADV analog-digital converter module (hereinafter referred to as the Q68ADV), and
Q68ADI analog-digital converter module (hereinafter referred to as the Q68ADI), which
are used in conjunction with MELSEC-Q Series CPUs.
In this manual, the Q64AD, Q68ADV, and Q68ADI are collectively referred to as the
A/D converter modules.
1.1 Features
(1) Select the type of module according to the application.
• Q64AD
...........
4 channels, where the voltage input or current input can be
selected for each channel.
• Q68ADV
........
8 channels, all of which are voltage input.
• Q68ADI
..........
8 channels, all of which are current input.
(2) High speed conversion
Conversion is performed at a high speed of 80 µ s/channel. Also, the
temperature drift compensation function can be performed using a processing
time of "conversion time for all channels + 160
s".
(3) High degree of accuracy
The degree of accuracy for the conversion process is ± 0.1% (When the ambient
temperature is 25 ± 5 °C).
(4) Changing the resolution mode
The resolution mode can be changed according to the application, and digital-
value resolution settings of 1/4000, 1/12000 or 1/16000 can be selected.
(5) Changing the input range
The input range 1 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.
(6) Easy settings using the utility package
A utility package is sold separately (GX Configurator-AD).
The utility package is not a required item. However, it can be used to set initial
settings and automatic refresh settings on screen, reduce sequence programs,
and check settings and operating status.