A/D Conversion Time - Mitsubishi FX3U-4AD User Manual

FX /FX /FX PLC User's Manual - Analog Control Edition
3G 3U 3UC
FX -4AD-PNK-ADP (4-channel Resistance Thermometer Data Input)
3U
2.4

A/D Conversion Time

This section describes the A/D conversion time.
2.4.1 When connected to a FX
1. A/D conversion and special data register update timing
A/D conversion is performed at every arithmetic operation of the PLC.
During execution of END instruction, the PLC performs A/D conversion, reads out the A/D converted data,
and then writes the data in the special data registers.
FX -4AD-PNK-ADP
3U
conversion
200 µs/4ch
2. A/D conversion during PLC stop
Even if the PLC is stopped, A/D conversion will be performed and the special data registers will be updated.
3. If two or more analog special adapters are connected
During execution of the END instruction, data will be read out from all the connected adapters (in the order of
1st adapter → 2nd adapter...4th adapter).
4. A/D conversion speed (data update time)
During execution of the END instruction, the A/D converted data of all 4 channels will be read out in 200µs,
and the data read out will be written to the special data registers.
END instruction execution time will be "200µs × number of connected adapters."
J-8
, FX
3U
FX -4AD-PNK-ADP
3U
n'th
conversion
200 µs/4ch
A/D
PLC
3UC
1st
A/D conversion start
command
A/D
Digital value writing
A/D conversion start
command
Digital value writing
2 Specifications
2.4 A/D Conversion Time
FX /FX Series PLC
3U 3UC
Sequence
program
END instruction