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MELSEC-A
3 SPECIFICATION
3.4.1 Combinations of various functions
You can set the analog output as indicated in Table 3.4 by combining the Analog
output enable/disable setting (RWwm+8), CH. analog output enable/disable flag
(RYn0 to RYn7) and HOLD/CLEAR setting (RWwm+B).
Make setting according to your system application.
Table 3.4 Analog output status combination list
Analog output enable/disable
setting (RWwm+8)
Enable Prohibit
CH. analog output enable/
disable flag (RYn0 to RYn7)
Enable (ON)
Prohibit (OFF)
Enable or disable
Setting
combi-
nation
Exe-
cution
status
HOLD/CLEAR setting (RWwm+B)
HOLD
CLEAR
HOLD or CLEAR
HOLD or CLEAR
Analog output status when the PLC CPU is in the
RUN status
Output of the analog value after D/A
conversion from the digital value specified
by the PLC CPU
Offset value
0V
Analog output status when the PLC CPU is in the
STOP status
Analog value before
the PLC CPU stop is
retained
Offset value
Offset value
0V
Analog output status at PLC CPU stop error
Analog value before
the PLC CPU stop is
retained
Offset value
Offset value
0V
Analog output status at occurrence of AJ65VBTCU-
68DAV digital value setting error
Output of the maximum or minimum analog
value
Offset value
0V
Analog output status when the "L RUN" LED turns
off/"L.ERR" LED turns on
The analog value
before the "L RUN"
LED turns off is
retained.
Offset value
Offset value
0V
Analog output status when the "L ERR." LED
flickers
Output of the analog value after D/A
conversion from the digital value specified
by the PLC CPU
Offset value
0V
Analog output status in initial processing completion
status after power-reset
Output of the analog value after D/A
conversion from the digital value specified
by the PLC CPU
Offset value
0V
Analog output status at occurrence of AJ65VBTCU-
68DAVN output range setting error
0V 0V 0V
0V
Analog output status at occurrence of AJ65VBTCU-
68DAVN watchdog timer error
0V 0V 0V
0V
POINT
When the QnACPU is used, using "Y" as the remote output (RY) refresh device of
the automatic refresh parameter may not hold the analog value even for the HOLD
setting.
For the HOLD setting, use "M" or "B" as the remote output (RY) refresh device.