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FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
20 Positioning Control – FNC150 to FNC159
20.2 FNC151 – DVIT / Interrupt Positioning
20.2 FNC151 – DVIT / Interrupt Positioning
Outline
This instruction executes one-speed interrupt constant quantity feed.
→ For explanation of the instruction, refer to the Positioning Control Edition manual.
→ For cautions on using special high speed output adapters,
refer to the Positioning Control Edition manual.
1. Instruction format
2. Set data
*1. Setting range: −32768 to +32767 (except 0) in 16-bit operation
−999,999 to +999,999 (except 0) in 32-bit operation
*2. Setting range: 10 to 32767 Hz in 16-bit operation
Following range in 32-bit operation
3. Applicable devices
S1 : Specify Y000, Y001 or Y002 transistor output from the main unit, or specify Y000, Y001, Y002
*2
or Y003
*2
from
a high-speed output special adapter
*1
.
*1. High-speed output special adapters can be connected only to FX
3U PLC.
*2. To use Y002 and Y003 with a high-speed output special adapter, connected a second high-speed output
special adapter.
Points
• When using a relay output type FX3U PLC, a special high speed output adapter is required.
• Outputs of special high speed output adapters work as differential line drivers.
Operand type Description Data type
Number of output pulses (incremental address) after interrupt
*1
16- or 32-bit binary
Output pulse frequency
*2
Device number (Y) from which pulses are to be output
Bit
Device number to which rotation direction signal is output
Pulse output destination Setting range
FX
3U PLC Special high speed output adapter 10 to 200,000 (Hz)
FX
3U/FX3UC PLC Main unit (transistor output) 10 to 100,000 (Hz)
Oper-
and
Type
Bit Devices Word Devices Others
System User Digit Specification System User
Special
Unit
Index
Con-
stant
Real
Number
Charac-
ter String
Pointer
XYMTCSD.b KnX KnY KnM KnS T C D R U\G VZModifyKH E ""P
33333333 3 333
33333333 3 333
S
1
3
S
2
33S3 3
FNC 151
DVIT
D
DVIT
16-bit Instruction
9 steps
Mnemonic Operation Condition
Continuous
Operation
DDVIT
32-bit Instruction
17 steps
Mnemonic Operation Condition
Continuous
Operation
S
1
S
2
D
1
D
2
S
1
S
2
D
1
D
2