Mitsubishi Electric MELSEC-A/QnA Series - Functional Comparison

3 ANALOG OUTPUT MODULE REPLACEMENT
3 - 63
3.9.2 Functional comparison
: Available, - : Not available
Item Description A68DAV Q68DAVN Precautions for replacement
D/A conversion enable/
disable function
Specifies whether to enable or disable the D/A
conversion for each channel.
On Q68DAVN, by disabling the
D/A conversion for the channels
that are not used, the conversion
speed can be shortened.
D/A output enable/
disable function
Specifies whether to output the D/A conversion value or
the offset value for each channel.
The conversion speed stays constant regardless of
whether D/A output is enabled or disabled.
On Q68DAVN, the output enable/
disable is set with Y signal (CH
Output enable/disable flag).
Synchronous output
function
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" 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.
-
Analog output HOLD/
CLEAR function
Retains an analog value that was output when the
programmable controller CPU is in the STOP status or
an error occurs.
1) On Q68DAVN, the setting of
HOLD/CLEAR is carried out
for each channel.
2) For the Q68DAVN, this
function is set with the
intelligent function module
switch setting.
3) Refer to ("Analog output
status combination list" in the
Digital-Analog Converter
Module User's Manual to
check the execution status of
output.
Analog output test while
the programmable
controller CPU is in the
STOP status
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 status.
-
Resolution mode
Switches the resolution mode according to the
application.
The resolution can be selected from 1/4000, 1/12000, or
1/16000.
The resolution mode is batch-set for all channels.
Online module
replacement
Replaces a module without stopping the system. -
Replaceable modules during
online are the Process CPU and
the Redundant CPU.
Setting
combi
nation
D/A conversion
enable/disable
Enable Disable
CH Output
enable/disable
flag
Enable Disable Enable Disable
Analog output test Allowed
Not
allowed
Not allowed