Analog Output Hold/Clear Function - Mitsubishi Electric MELSEC L Series User Manual

8.4

Analog Output HOLD/CLEAR Function

Common
This function sets whether to hold the output analog value (HOLD) or clear the output analog value (CLEAR) when the
CPU module operating status is RUN, STOP, or stop error.
(1) Combination of analog output status
The analog output status of the D/A converter module in the normal output mode differs from the status in the
wave output mode, as described in (a) and (b).
(a) Normal output mode
The analog output status changes as shown in the following table, depending on the combination of settings for
D/A conversion enable/disable setting (Un\G0) and CH Output enable/disable flag (Y1 to Y8).
D/A conversion enable/disable setting
Execution status CH Output enable/disable flag (Y1 to Y8)
Analog output HOLD/CLEAR function
Analog output status when CPU module is in RUN status
Analog output status when CPU module is in STOP status
Analog output status when CPU module is in stop error
Analog output status when a watchdog timer error
*1 The error occurs due to a hardware failure of the D/A converter module or other causes. Module READY (X0) and the
RUN LED of the D/A converter module turn off.
*2 The following operation is performed when the CPU module is in STOP status, D/A conversion enable/disable setting
(Un\G0) is set to D/A conversion enable (0) for the channel where HOLD is set, and Operating condition setting request
(Y9) is turned to OFF  ON  OFF.
• Output enable/disable flag OFF: 0V/0mA output
• Output enable/disable flag OFF  ON: offset value output
For the L60DAVL8 or L60DAIL8, the error is 2%.
*3
(Un\G0)
setting
Analog value converted from digital
value with D/A conversion is output.
*1
occurs 0V/0mA
Enable
Enable
HOLD CLEAR
Hold Offset value
Hold Offset value
*3 *3
0V/0mA
CHAPTER 8 FUNCTIONS
Disable
Disable Enable or disable
HOLD or CLEAR HOLD or CLEAR
*3
Offset value
0V/0mA
*2 *3
Offset value 0V/0mA
Offset value *3
0V/0mA
*3 *3
0V/0mA 0V/0mA
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