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PLC User's Manual - Positioning Control Edition
Built-in Positioning Functions
6 Mechanical Zero Return (DSZR/ZRN Instruction)
6.3 Zero Return (ZRN Instruction)
B - 100
6.3 Zero Return (ZRN Instruction)
Use this instruction to change the CLEAR signal output destination with an FX3U/FX3UC PLC Ver.2.20 or later
or an FX
3G PLC.
6.3.1 Instruction Format
1. Instruction Format
2. Data setting
*1. Setting range : 10 to 32,767 Hz for 16-bit operation
For 32-bit operation, however, the setting range should be as shown in the following
table.
3. Devices
1:D.b is available only in FX3U and FX3UC PLCs. However, index modifiers (V and Z) are not available.
2 : 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 14-point and 24-point type
FX3G PLC.
*2. High-speed input/output special adapters can be connected only to the
FX3U PLC.
*3. To use Y002 and Y003 of a high-speed output special adapter, connect a second high-speed output
special adapter.
3 : Only available for
FX3U and FX3UC PLCs.
Note:
• To use an FX
3U Series main unit of relay output type, be sure to connect a high-speed output special
adapter. Differential line drive type outputs will be used for the outputs of the high-speed output special
adapter.
Operand type Description Data type
Specifies the zero return speed.
*1
BIN16/32-bit
Specifies the creep speed. (Setting range: 10 to 32,767 Hz)
Specifies an input number for the near-point signal(DOG).
Bit
Specifies the pulse output number.
Pulse output destination Setting range
FX
3U PLC High-speed output special adapter 10 to 200,000(Hz)
FX
3G/FX3U/FX3UC PLC Main unit (transistor output) 10 to 100,000(Hz)
Operand
type
Bit device Word device Others
System user Digit designation System user
Special
unit
Index
Con-
stant
Real
num-
ber
Char-
acter
string
Pointer
XYMTCSD
.b KnX KnY KnM KnS T C D R U\G V Z Modify K H E ""P
3 3 3 3 3333
3 33 3 33
3 3 3 3 3333
3 33 3 33
333 3
1
3
2
3
FNC 156
ZRN
ZERO RETURN
D
16-bit
instruction
9 steps
ZRN
-
Continuous
execution
type
Instruction
symbol
Execution condition
32-bit
instruction
Instruction
symbol
Execution condition
DZRN
-
Continuous
execution
type
17 steps
Command
input
FNC156
ZRN
S
1
•
S
2
•
S
3
•
D
•
S
1
S
2
S
3
D
S
1
S
2
S
3
D