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20 Applied Instructions (Positioning Control)
20.1 DSZR / Dog Search Zero Return
518
FXCPU Structured Programming Manual
[Basic & Applied Instruction]
20.1 DSZR / Dog Search Zero Return
Outline
This instruction matches the mechanical position and the current value register in the PLC by zero return.
This instruction can perform following operation which is not supported by ZRN.
• Corresponding action of DOG search function
• Zero return is possible by using near-point DOG and zero-point signal.
Zero point cannot be determined by counting the zero-point signals.
→ As for explanation of the instruction, see the positioning control manual.
→ As for cautions of use of high speed output special adapter, see the positioning control manual.
1. Format and operation, execution form
2. Set data
3. Applicable devices
S: Refer to "Cautions".
Function and operation explanation
FX3U(C) FX3G(C) FX3S FX2N(C) FX1N(C) FX1S FXU/FX2C FX0N FX0(S)
Instruction
name
Operation
Execution
form
Expression in each language
Structured ladder/FBD ST
DSZR 16 bits Continuous DSZR(EN,s1,s2,d1,d2);
Variable Description Data type
Input
variable
EN Execution condition Bit
Device for entering the near-point signal (DOG) Bit
Device for entering zero-point signal Bit
Output
variable
ENO Execution state Bit
Device for issuing pulse (Y) Bit
Device of rotating direction signal Bit
Operand
type
Bit Devices Word Devices Others
System user Digit designation
System
user
Special
unit
Index
Cons
tant
Real
Number
Character
String
Pointer
XYMTCS
D
.b
KnX KnY KnM KnS T C D R
U\G
VZModifierKH E
"
"
P
zzz z
S1
z
S2
z
S3
z
S4
zz
S1
z
DSZR
EN
s1
ENO
d1
d2s2
Device for issuing pulse
Device of rotating direction signal
DSZR
EN
s1
ENO
d1
d2s2
Command
input
Device for entering the near-point signal (DOG)
Device for entering zero-point signal