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FX3S/FX3G/FX3GC/FX3U/FX3UC Series
Programming Manual - Basic & Applied Instruction Edition
14 Handy Instruction – FNC 60 to FNC 69
14.8 FNC 67 – RAMP / Ramp Variable Value
• 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 2 seconds.
2. Operation of the mode flag (M8026)
In FX3U/FX3UC PLCs, the contents of are changed as follows depending on the ON/OFF status of the mode
flag M8026.
In FX
3S/FX3G/FX3GC PLCs, the contents of are same as the case "2) When M8026 is ON" below regardless of
the ON/OFF status of the mode flag M8026.
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. M8026 is available only in FX
3U/FX3UC PLCs, and is cleared when the PLC mode switches from RUN to
STOP.
Caution
1. When specifying a latched (battery backed) type device as
When setting 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
S
1
(M8029)
Command
S
2
S
1
D
D
1
D
D
1
S
1
D
1
S
2
D
1
D
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