Filter
Top Products
548
FX3S/FX3G/FX3GC/FX3U/FX3UC Series
Programming Manual - Basic & Applied Instruction Edition
20 Positioning Control – FNC150 to FNC159
20.1 FNC150 – DSZR / Dog Search Zero Return
20.1 FNC150 – DSZR / Dog Search Zero Return
Outline
This instruction executes a zero return, and aligns the mechanical position with a present value register inside the
PLC.
In addition, this instruction enables the following functions not supported by the ZRN (FNC156) instruction:
• DOG search function
• Zero return by the near-point (dog) signal and zero-phase signal
It is not possible, however, to count the zero-phase signal and then determine the zero point.
→ 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
3. Applicable devices
S1:"D.b" is available only in FX3U/FX3UC PLCs. However, index modifiers (V and Z) are not available.
S2 : In the case of FX
3G/FX3GC/FX3U/FX3UC PLCs, specify X000 to X007.
In the case of FX
3S PLC, specify X000 to X005.
S3 : Specify Y000, Y001 or Y002
*1
transistor output from the main unit, or specify Y000, Y001, Y002
*3
or Y003
*3
from a high-speed output special adapter
*2
.
*1. Y002 is not available in FX
3G PLC (14-point and 24-point type) and FX3S/FX3GC PLCs.
*2. High-speed output special adapters can be connected only to FX
3U PLC.
*3. 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 or triac 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
Device number for near-point signal (dog)
Bit
Input number for zero-phase signal
Device number (Y) from which pulses are to be output
Device number to which rotation direction signal is output
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 V Z Modify K H E ""P
S1
S
2
S
3
S
4
S1
FNC 150
DSZR
−
Mnemonic Operation Condition
16-bit Instruction
9 steps DSZR
Mnemonic Operation Condition
Continuous
Operation
32-bit Instruction
S
1
S
2
D
1
D
2
S
1
S
2
D
1
D
2