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PLC User's Manual - Positioning Control Edition
Built-in Positioning Functions
10 Variable Speed Operation (Variable Speed Pulse Output)-PLSV Instruction
10.1 Instruction Format
B - 134
10. Variable Speed Operation
(Variable Speed Pulse Output)-PLSV Instruction
The built-in positioning function uses the variable speed pulse output (PLSV) instruction equipped with the
rotation direction designation function to perform variable speed operation. If an FX
3U/FX3UC PLC Ver.2.20 or
later or FX
3G PLC is used, this instruction can change the speed using the acceleration/deceleration speed.
10.1 Instruction Format
1. Instruction Format
2. Data setting
*1. Setting range : -32,768 Hz to -1 Hz and +1 Hz to 32,767 Hz for 16-bit operation. For the
32-bit operation, however, the setting range should be as shown in the following table.
3. Devices
1 : 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 with a high-speed output special adapter, connect a second high-speed output
special adapter.
Operand type Description Data type
Specifies the output pulse frequency designation device number.
*1
BIN 16/32-bit
Specifies the pulse output device number.
Bit
Specifies the rotation direction signal output destination device number.
Pulse output destination Setting range
FX
3U PLC High-speed output special adapter -200,000 to -1 to +1 to 200,000(Hz)
FX
3G/FX3U/FX3UC
PLC
Main unit (transistor output) -100,000 to -1 to +1 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
33333333
4 33 3 3 3
1
3
2
33
3 3
32-bit
instruction
17 steps
DPLSV
Continuous
execution
type
Instruction
symbol
Execution condition
-
FNC 157
PLSV
PULSE V
D
16-bit
instruction
9 steps
PLSV
Continuous
execution
type
Instruction
symbol
Execution condition
-
S
D
1
D
2
S
D
1
D
2