Absolute Position Detection System (Absolute Current Value Read)-Abs Instruction; Instruction Format - Mitsubishi MELSEC-F FX3U Series User Manual

FX /FX Series PLC User's Manual - Positioning Control Edition
3U 3UC
Built-in Positioning Function
7. Absolute Position Detection System
(Absolute Current Value Read)-ABS Instruction
Since the absolute position detection system is adopted, the built-in positioning function uses the current ABS
value read-out (ABS) instruction to read out the current value (absolute position (ABS) data) from the
MELSERVO-H, -J2(S), or -J3 servo amplifier.
→ For the servo amplifier and connection of the MELSERVO Series, refer to the Appendix and the
7.1

Instruction Format

1. Instruction Format
FNC 155
D
ABS
ABSOLUTE
Command
input
FNC 155
DABS
2. Data setting
Operand type
Specifies the first number of the device that inputs the absolute position (ABS) data
S
from the servo amplifier. Number of occupied points: 3 (first point for
Specifies the first number of the device that outputs the absolute position (ABS) data
D
1
control signal to the servo amplifier. Number of occupied points: 3 (first point for
Specifies the absolute position (ABS) data (32-bit value) storage device number.
D
2
3. Devices
Bit device
Operand
System user
type
X Y M T C S D .b KnX KnY KnM KnS T C D R U /G
S
D
1
D
2
: The D .b cannot be indexed by index registers (V and Z).
→ For the items to be observed in programming, refer to Section 4.7.
16-bit
Instruction
Execution condition
instruction
symbol
−
−
•
S• D D
1 2•
Digit designation
7 Absolute Position Detection System (Absolute Current Value Read)-ABS
32-bit
instruction
13 steps
Description
Word device
Special
System user Index
unit
V Z Modify K H
7.1 Instruction Format
examples of connection.
Instruction
Execution condition
symbol
Continuous
DABS
execution
−
type
Data type
)
S
BIN16-bit
)
D
1
BIN32-bit
Others
Real Char-
Con-
num- acter Pointer
stant
ber string
E " "
B - 93
A
B
Apx.
P