User`s manual

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MELSEC-Q
1 OVERVIEW
1 OVERVIEW
This User’s Manual provides the specifications, handling instructions and
programming methods for the following digital-analog converter modules that are
used in combination with MELSEC-Q series CPU modules (hereinafter referred to as
PLC CPU).
• Q62DAN type digital-analog converter module (hereinafter referred to as the Q62DAN)
• Q64DAN type digital-analog converter module (hereinafter referred to as the Q64DAN)
• Q68DAVN type digital-analog converter module (hereinafter referred to as the Q68DAVN)
• Q68DAIN type digital-analog converter module (hereinafter referred to as the Q68DAIN)
• Q62DA type digital-analog converter module (hereinafter referred to as the Q62DA)
• Q64DA type digital-analog converter module (hereinafter referred to as the Q64DA)
• Q68DAV type digital-analog converter module (hereinafter referred to as the Q68DAV)
• Q68DAI type digital-analog converter module (hereinafter referred to as the Q68DAI)
In this manual, the Q62DAN, Q64DAN, Q68DAVN, Q68DAIN, Q62DA, Q64DA,
Q68DAV and Q68DAI are collectively referred to as the D/A (Digital-Analog) converter
modules.
1.1 Features
(1) Available models
• Q62DAN, Q62DA
.............
2 channels: Voltage or current output can be selected for
each channel.
• Q64DAN, Q64DA ............. 4 channels: Voltage or current output can be selected for
each channel.
• Q68DAVN, Q68DAV ........ 8 channels: All of which are voltage output.
• Q68DAIN, Q68DAI ........... 8 channels: All of which are current output.
(2) Improved security and noise immunity (Q62DAN, Q64DAN,
Q68DAVN, Q68DAIN only)
Since isolation is provided between the external power supply and analog output
channels, the security and noise immunity have been increased.
(3) High-speed conversion processing
Conversion processing is performed at a speed of 80 s/channel.
(4) High degree of accuracy
The conversion accuracy is ± 0.1% (When the ambient temperature is 25 ± 5 °C).
(5) 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.
(6) Changing the output range
The output range
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can easily be changed using GX Developer.
1 The output range refers to the type of offset/gain settings. The most
frequently used range is set as the default but the user can also specify their
own offset/gain settings.
(7) Synchronous output function
This function sets a constant time (120 s) until the analog value is output after
the digital value is written from the PLC CPU. Highly accurate analog control can
be achieved by combining this function with a constant cycle execution type
program for the PLC CPU or the constant scan function
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.
2 The constant scan function executes the sequence program within a fixed
time interval.
(8) Analog output HOLD/CLEAR function
This function is set to either retain or clear the analog output value when the CPU
module is in the STOP status or when a stop error occurs.
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