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(7) Analog output HOLD/CLEAR function
The following describes Trigger output request (RY19, RY29) and the analog output HOLD/CLEAR function.
• Even if Trigger output request (RY19, RY29) is turned on while the analog output HOLD/CLEAR function is
being executed, the D/A conversion is not performed. This is the same for the trigger output request
assigned to the extension digital input module as an external signal.
• Even when the operating status of the CPU module is back to RUN, the analog output value is not updated
until the D/A conversion is performed by another Trigger output request (RY19, RY29).
Controlled by the D/A converter module
Controlled by the program
Trigger output request
(RY19, RY29)
after external signal assignment
Analog output value of CH2
(HOLD setting)
D/A conversion processing
Operating status of CPU module
Trigger output completed clear
request (RY1A, RY2A)
Trigger output completed flag
(RX19, RX29)
Waiting for
trigger input
Waiting for
trigger input
Waiting for
trigger input
Waiting for
trigger input
1st D/A
conversion
2nd D/A
conversion
1st D/A
conversion value
2nd D/A
conversion value
1st D/A conversion value
1st D/A conversion value
Analog output value of CH1
(CLEAR setting)
1st D/A
conversion value
2nd D/A
conversion value
Offset value
Offset value
Analog output
HOLD/CLEAR
function in execution
If the CPU module is turned to RUN,
the analog output value is not updated
until next D/A conversion.
During execution of the HOLD/CLEAR function,
a trigger output request is denied.
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
OFF
OFF
OFF
ON
ON
RUN
RUN
ON
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