Omron HOME SECURITY SYSTEM - MOTION SENSOR FQM1-MMA21 - Manual (Page 49)

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Function Tables Arranged by Purpose Section 1-7
1-7-4 High-speed Analog I/O Control
Detecting speed
using rotary
encoder inputs Detecting speed
and use in out-
put control while
managing posi-
tion using
encoder inputs Measuring dis-
placement of
workpiece per
unit time Monitoring High-
speed Counter
Movement
(cycle time) 7-5-8 Pulse Input Function Description
Outputs the change in the high-speed counter
PV each cycle, while outputting number of input
pulses as high-speed counter PV.
Used for applications such as detecting speed of
external master axis during synchronous con-
trol.
Monitoring High-
speed Counter
Movement
(sampling time
specified) 7-5-8 Pulse Input Function Description
Outputs the change in the high-speed counter
PV each sampling cycle (1 to 9,999 ms) speci-
fied asynchronously to Motion Control Module
cycle.
Used for applications such as detecting external
device speed or number of pulses within a spec-
ified time (not used for output control).
Monitoring
speed while
managing work-
piece position
using encoder
input Measure input
pulse cycle Counter fre-
quency mea-
surement (pulse
input 1 only) 7-5-8 Pulse Input Function Description
Number of input pulses can be monitored simul-
taneously as high-speed counter PV and pulse
frequency.
Purpose Operation Main functions
used
Details
Measuring
undulation, dis-
tortion, thick-
ness, height, or
diameter, etc., of
an object High-speed
tracing of analog
data when
external signal
turns ON Storing analog
input value in
memory at
specified time
(constant cycle) • Interval timer
interrupts
• PRV(881)
instruction
7-9-3 Analog Input Function Specifications
Can perform analog sampling at a constant
cycle, using scheduled interrupt processing in
analog input immediate refresh mode.
Sampling can be executed at small time inter-
vals using analog input conversion (40
µs).
Data stored in memory can also be displayed on
PT and other display devices, e.g., to show
trends.
High-speed
tracing of analog
data synchro-
nized with tar-
get object
position Storing analog
inputs to DM
Area synchro-
nous with posi-
tion (pulse input) High-speed
analog sam-
pling function 7-9-7 High-speed Analog Sampling (FQM1-
MMA21 Only)
Sampling of target measurement object position
as compared to the sampling based on time.
Interrupt tasks, as outlined above, are not used,
so even more detailed sampling is possible.
Used for applications such as generating dis-
placement data for the measurement object
from one position to another position.
Purpose Operation Main functions
used
Details