Mitsubishi Electric Q62DAN - 3.2 D;A Converter Module Function; 3.2.1 Synchronous output function

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MELSEC-Q
3 SPECIFICATIONS
3.2 D/A Converter Module Function
Table 3.3 shows the function of the D/A converter modules.
Table 3.3 Function list
Item Function Reference section
D/A conversion enable/disable
(1) Specifies whether to enable or disable the D/A conversion for each channel.
(2) By disabling the D/A conversion for the channels that are not used, the conversion speed can
be shortened.
Section 3.4.4
D/A output enable/disable
function
(1) Specifies whether to output the D/A converted value or output the offset value for each channel.
(2) The conversion speed stays constant regardless of whether D/A output is enabled or disabled.
Section 3.3.1
Synchronous output function (1) An analog output synchronized with the programmable controller CPU can be obtained. Section 3.2.1
Analog output HOLD/CLEAR
function
(1) The output analog value can be retained when the programmable controller CPU module is
placed in the STOP status or when an error occurs.
Section 3.2.2
Analog output test during
programmable controller CPU
STOP
(1) When CH Output enable/disable flag is forced on during programmable controller CPU STOP,
the D/A converted analog value is output.
Section 3.2.3
Resolution mode
(1) The resolution mode can be changed according to the application, and a resolution setting can
be selected from 1/4000, 1/12000 and 1/16000.
(2) The resolution mode setting is applicable to all channels in block.
(3) Refer to Section 3.1.1 for the digital input values and maximum resolution in normal resolution
mode and high resolution mode.
Section 3.1.1
Section 4.5
Online module change (1) A module change is made without the system being stopped. Chapter 7
3.2.1 Synchronous output function
An analog output that is synchronized with the programmable controller CPU can be
obtained.
The analog output will be updated after Synchronous output request (YD) is set to on
and the time specified as "Programmable controller CPU processing time + 120 s"
has elapsed.
However, the analog output will be fixed to CH1, and other channels (CH2 to CH8)
cannot be used.
When the module is mounted on a remote I/O station, the analog output will not be
synchronized because of a link scan delay if the synchronous output function is
specified.
<Program example>
Digital write from the
programmable controller
CPU
Synchronous output
request (YD)
Analog output value
Always constant
Write command
DELTA
DYD
T0 K1 D0 K1H0
Digital value write
Outputs synchronous
output request as a pulse