Functional Comparison - Mitsubishi Electric MELSEC-A/QnA Series Handbook

3
ANALOG OUTPUT MODULE REPLACEMENT

3.3.2 Functional comparison

Item
Specifies whether to enable or disable the D/A conversion
D/A conversion
for each channel. By disabling the D/A conversion for the
enable/disable
channels that are not used, the conversion speed can be
function
shortened.
Specifies whether to output the D/A conversion value or the
D/A output enable/ offset value for each channel.
disable function The conversion speed stays constant regardless of
whether D/A output is enabled or disabled.
Obtains analog output synchronized with the
programmable controller CPU.
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 + 120µs"
Synchronous output
has elapsed.
function
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.
Retains an analog value that was output when the
Analog output HOLD/
programmable controller CPU is in the STOP status or an
CLEAR function
error occurs.
Outputs the analog value converted from a digital value
when CH Output enable/disable flag is forcibly turned on
while the programmable controller CPU is in the STOP
Analog output test
status.
while the
programmable
Setting
controller CPU is in the
combi
STOP status
nation
Analog output test
Switches the resolution mode according to the application.
The resolution can be selected from 1/4000, 1/12000, or 1/
Resolution mode
16000.
The resolution mode is batch-set for all channels.
Online module
Replaces a module without stopping the system.
replacement
3
- 15
Description
D/A conversion
Enable
enable/disable
CH Output
Enable Disable Enable Disable
enable/disable flag
Not
Allowed
allowed
A616DAV Q68DAVN Precautions for replacement
-
-
Disable
Not allowed
-
-
: With functions, -: Without functions
On Q68DAVN, the output
enable/disable is set with Y
signal (CH Output enable/
disable flag).
1) Refer to ("Analog output
status combination list" in
the Digital-Analog
Converter Module User's
Manual to check the
execution status of output.
2) For the Q68DAVN, this
function is set with the
intelligent function module
switch setting.
Replaceable modules during
online are the Process CPU
and the Redundant CPU.