D/A Converter Module Function; Synchronous Output Function - Mitsubishi MELSEC-Q Q62DAN User Manual

3 SPECIFICATIONS

3.2 D/A Converter Module Function

Item
D/A conversion enable/disable
function
D/A output enable/disable
function

Synchronous output function

Analog output HOLD/CLEAR
function
Analog output test during
programmable controller CPU
STOP
Resolution mode
Online module change
3.2.1 Synchronous output function
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Table 3.3 shows the function of the D/A converter modules.
Table 3.3 Function list
(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.
(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.
(1) An analog output synchronized with the programmable controller CPU can be obtained.
(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.
(1) When the CH output enable/disable flag is forced ON during programmable controller CPU
STOP, the D/A converted analog value is output.
(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) See Section 3.1.1 for the digital input values and maximum resolution in normal resolution mode
and high resolution mode.
(1) A module change is made without the system being stopped.
An analog output that is synchronized with the programmable controller CPU can be
obtained.
The analog output will be updated after the synchronous output request (YD) is set to ON
and the time specified as "Programmable controller CPU processing time + 120
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.
Digital write from the
programmable controller
CPU
Synchronous output
request (YD)
Analog output value
<Program example>
Write command
Function
Always constant
T0 H0 K1 D0
DELTA YD
K1
Digital value write
Outputs synchronous
output request as a pulse
MELSEC-Q
Reference section
Section 3.4.4
Section 3.3.1
Section 3.2.1
Section 3.2.2
Section 3.2.3
Section 3.1.1
Section 4.5
Chapter 7
s"
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