A/D Conversion Starting Time Setting Function (Q62Ad-Dgh Only) - Mitsubishi Q64AD-GH User Manual

3 SPECIFICATIONS

3.2.5 A/D conversion starting time setting function (Q62AD-DGH only)

[Example] When the time necessary from when the 2-wire transmitter powers on until its output stabilizes is 500ms
A/D conversion enable/disable setting
(Power supply to 2-wire transmitter
ON/OFF)
(Buffer memory address 0: Un\G0)
26V power supply to 2-wire transmitter
Analog output of 2-wire transmitter
A/D conversion completed flag when A/D
conversion starting time is set to 500ms
(Buffer memory address 10: Un\G10)
A/D conversion completed flag when A/D
conversion starting time is set to 0ms
(Buffer memory address 10: Un\G10)
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(1) As the A/D conversion starting time, set the "time necessary from when the used
2-wire transmitter powers on until its output stabilizes".
This setting allows A/D conversion processing to be started as soon as the output
of the 2-wire transmitter stabilizes.
(2) Set the time to the CH
addresses 5, 6: Un\G5, Un\G6).
(3) The following indicates the time until the A/D conversion completed flag (buffer
memory addresses 10: Un\G10) turns ON when the A/D conversion starting time
has been set.
(A/D conversion starting time) + (A/D conversion pre-processing: Approx. 150 to
165ms) + (A/D conversion processing: 10ms)
POINT
Set the A/D conversion starting time in consideration of the time necessary from
when the 2-wire transmitter powers on until its output stabilizes and the warm-up
time of the 2-wire transmitter.
A/D conversion starting time setting (buffer memory
A/D conversion enable
Power ON
When A/D conversion starting time is 0ms,
A/D conversion processing starts at this point.
Max.
20ms
When A/D conversion starting time is 500ms,
A/D conversion processing starts at this point.
500ms
(A/D conversion
starting time)
Approx.
ON
150 to 165ms
(A/D conversion
pre-processing)
10ms (A/D conversion processing time)
MELSEC-Q
ON
Approx.150 to 165ms
(A/D conversion
pre-processing)
10ms
(A/D conversion
processing time)
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