Function Details Of D/A Conversion; D/A Output Enable/Disable Function; Analog Output Hold/Clear Function - Mitsubishi Electric Q64AD2DA User Manual

4
FUNCTION
4.3

Function Details of D/A Conversion

4.3.1

D/A output enable/disable function

Set whether D/A conversion values are output or offset values are output for each
channel.
(1) Setting methods
(2) D/A output enable/disable function and the conversion speed
4.3.2

Analog output HOLD/CLEAR function

For the case where the CPU module is placed in STOP or in a stop error status, whether to
hold (HOLD) or clear (CLEAR) the analog output value can be set.
(1) Setting methods
(2) Analog output status combination
CH5 D/A conversion enable/disable
Execution
status CH5 Output enable/disable flag (Y5)
Analog output HOLD/CLEAR setting
Analog output status when a CPU module is RUN
Analog output status when a CPU module is STOP
Analog output status when a CPU module stop error occurs
Analog output status when a watchdog timer error
occurs in the Q64AD2DA
CH5 Output enable/disable flag (Y5) can be used.
CH5 Output enable/disable flag
(Y5)
Output enabled (ON)
Output disabled (OFF)
The conversion speed is calculated by the formula (500 s
conversion enabled) regardless of whether CH5 Output enable/disable flag (Y5) is
enabled (ON) or disabled (OFF).
Set the HOLD/CLEAR in "Switch 3" cell of Switch setting for I/O and intelligent
function module dialog box. (Refer to Section 7.5.2.)
Depending on combinations of the HOLD/CLEAR setting, CH5 D/A conversion
enable/disable setting (Un\G800), and CH5 Output enable/disable flag (Y5), the
analog output status varies as shown in Table 4.11.
Table 4.11 Analog output status combination list
setting (Un\G800)
function setting
*1
* 1 This occurs when program operations are not completed within the scheduled time due to a
hardware problem of the Q64AD2DA. When a watchdog timer error occurs, Module ready (X0) is
set to off and the Q64AD2DA RUN LED is turned off.
Table 4.10 D/A output enable/disable function
Outputs D/A conversion values.
Setting combination
Enable
Enable
HOLD CLEAR
Outputs analog values converted
from digital input values.
Hold Offset
Hold Offset
0V/0mA 0V/0mA
4.3 Function Details of D/A Conversion
4.3.1 D/A output enable/disable function
Analog output
Outputs offset values.
Number of channels of
Disable
Enable or
Disable
disable
HOLD or HOLD or
CLEAR CLEAR
Offset 0V/0mA
Offset 0V/0mA
Offset 0V/0mA
0V/0mA 0V/0mA
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