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CHAPTER 8 FUNCTIONS
8
8.15 Trigger Conversion Function
● With the extension A/D converter module connected, processing time (100μs) arises in the period from the completion of
conversion processing of each channel to the start of conversion processing of the next channel. Therefore, the
conversion time per channel of the main A/D converter module and the extension A/D converter module is given by the
following:
• With the conversion speed switch (address: 0001H) set to 100μs: 100μs + 100μs = 200μs
• With the conversion speed switch (address: 0001H) set to 400μs: 400μs + 100μs = 500μs
● With the extension D/A converter module connected, the setting of the conversion speed switch (address: 0001H) is
ignored, and the conversion speed is fixed to 100μs. In addition, processing time (100μs) arises in the period from the
completion of conversion processing of each channel to the start of conversion processing of the next channel.
Therefore, the conversion time per channel of the main A/D converter module and the extension D/A converter module is
200μs.
(4) From start to end of trigger conversion
Set Mode switch (address: 0000H) to Trigger conversion mode (1H).
Turning on and off Initial data setting request flag (RY9) results in the error code "0920H" being stored into Latest
warning code (RWr1).
Turning off and on the module power supply results in the A/D converter module being in the following state and
in the state of waiting for trigger conversion input:
• Trigger conversion completed flag (RX19, RX29) turns off.
•CH A/D conversion completed flag (RX10 to RX13, RX20 to RX23) turns off.
The figure below shows the operation until the completion of A/D conversion after turning on Trigger conversion
request (RY19, RY29) from off.
Turning on Trigger conversion request (RY19, RY29) from off allows the A/D converter module to start A/D
conversion processing. Once the A/D conversion has been completed, Trigger conversion completed flag (RX19,
RX29) turns on from off.
CH A/D conversion completed flag (RX10 to RX13, RX20 to RX23) turns on in order from the channel where A/D
conversion has been completed earlier after the start of trigger conversion.
After that, if the following events occur, CH A/D conversion completed flag (RX10 to RX13, RX20 to RX23) turns off:
• Turning on Initial data setting request flag (RY9) from off
• Detection of an input signal error
Trigger conversion request
(RY19, RY29)
A/D conversion
A/D
conversion
CH1 Digital operation value
(RWr2, RWr12)
Trigger conversion completed flag
(RX19, RX29)
Conversion value
Controlled by the A/D converter module
Waiting for trigger input Waiting for trigger input
0
ON
ON
OFF
OFF OFF
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