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

3 SPECIFICATIONS

3.2.1 Analog output HOLD/CLEAR function

D/A conversion enable/disable setting
Setting
(buffer memory address 0: Un\G0)
combination
CH Output enable/disable flag
execution
(Y1, Y2)
status
HOLD/CLEAR setting
Analog output status when programmable controller
CPU is RUN
Analog output status when programmable controller
CPU is STOP
Analog output status when a programmable
controller CPU stop error occurs
Analog output status when a watchdog timer error
occurs in the Q62DA-FG
1 This occurs when program operations are not completed within the scheduled time due to a hardware
problem of the Q62DA-FG. When a watchdog timer error occurs, Module ready (X0) turns off and the
Q62DA-FG RUN LED turns off.
2 Rate control function is activated.
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(1) For the case where the programmable controller CPU is placed in STOP or in a
stop error status, whether to hold (HOLD) or clear (CLEAR) the analog output
value can be set.
(2) Set the HOLD/CLEAR in "Switch 3" (HOLD/CLEAR function setting) cell of
Switch setting for I/O and intelligent function module dialog box. (Refer to Section
4.5 (1))
(3) Depending on combinations of the HOLD/CLEAR setting, D/A conversion
enable/disable setting (buffer memory address 0: Un\G0), and CH
enable/disable flag (Y1, Y2), the analog output status varies as shown in Table
3.3.
Table 3.3 Analog output status combination list
Enable
Enable
HOLD CLEAR
Output analog values converted
from digital values. 2
Hold Offset
Hold Offset
1
0 V/0 mA 0 V/0 mA
MELSEC-Q
Output
Disable
Enable or
Disable
disable
HOLD or CLEAR HOLD or CLEAR
Offset 0 V/0 mA
Offset 0 V/0 mA
Offset 0 V/0 mA
0 V/0 mA 0 V/0 mA
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