For Fx 3S Series Plc; For Fx 3G Series Plc - Mitsubishi Electric MELSEC-FX3S Series Manual

FX /FX /FX /FX /FX
3S 3G 3GC 3U 3UC
FX -1DA-BD (1-channel Analog Output)
3G
2.3 D/A Conversion Time
This section describes the D/A conversion time.
2.3.1 For FX Series PLC
3S
1. D/A conversion and special data register update timing
D/A conversion is performed at every scan time of the PLC.
During execution of the END instruction, the PLC writes the output setting data of the special data registers,
performs D/A conversion of the data, and updates the analog output data.
2. D/A conversion during PLC stop
If the output holding function cancellation setting is enabled by the special device, the offset value will be
output.
If the output holding function cancellation setting is disabled, the output at switching from RUN to STOP will
be latched.
Just after power-on, however, the offset value will be output until operation begins.
3. D/A conversion speed (data update time)
During execution of END instruction, the output setting digital data will be subject to D/A conversion which
takes 60 μs, after which the analog data will be output.
END instruction execution time will be 60 μs.
PLC User's Manual - Analog Control Edition
FX Series PLC
3S
Sequence Program
END instruction
D/A conversion
start command
conversion
FX
3G
Digital value
writing
D/A
60 s
/1ch
-1DA-BD
2 Specifications
2.3 D/A Conversion Time
G-9
A
B
C
D
E
F
G
H
I
J