390
FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
14 Handy Instruction – FNC 60 to FNC 69
14.8 FNC 67 – RAMP / Ramp Variable Value
• If the command input is set to OFF in the middle of operation, execution is paused. (The present data
value stored in
is held, and the number of scans stored in
+1 is cleared.) When the command
input is set to ON again,
is cleared, and the operation is started from
.
• After transfer is completed, the instruction execution complete flag M8029 turns ON, and the
value is
returned to the
value.
• When acquiring the operation result at a constant time interval (constant scan mode)
Write a prescribed scan time (which is longer than the actual scan time) to D8039 and set M8039 to ON to
select the constant scan mode in the PLC.
For example, when "20 ms" is written to D8039 and "n" is set to 100, the
value will change from
to
in 20 seconds.
2. Operation of the mode flag (M8026)
Depending on the ON/OFF status of the mode flag M8026, the contents of
+1 are changed as follows:
1) When M8026 is OFF
2) When M8026 is ON
Related devices
→
For the instruction execution complete flag use method, refer to Subsection 6.5.2.
*1.
Cleared when the RAMP mode is changed from RUN to STOP.
Caution
1. When specifying a latched (battery backed) type device (in the area latched (battery
backed)) as
When setting the PLC to the RUN mode while the command input is ON, clear
in advance.
Device
Name
Description
M8029
Instruction
execution complete
Turns ON when
becomes equivalent to
after "n" operation cycles.
M8026
*1
RAMP mode
Refer to the operation of the mode flag M8026 described above.
D
1
D
D
1
D
D
1
D
D
1
S
1
D
1
D
D
1
S
1
(M8029)
Command
S
2
S
1
D
D
1
D
D
1
S
1
D
1
S
2
D
1
D
(M8029)
Command
S
2
S
1
D
(M8029)
S
2
S
1
D
Command
D
S
2
D
1
D
D
1
D