Absolute Position Detection System (Absolute Current Value Read) - Abs Instruction; Instruction Format - Mitsubishi Electric Melsec-F FX3GC Series User Manual

FX /FX /FX /FX /FX
3S 3G 3GC 3U 3UC
Built-in Positioning Functions
7. Absolute Position Detection System
(Absolute Current Value Read) - ABS Instruction
With the use of the servo absolute position detection system, 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
MR-J4A, MR-J3A, MR-J2(S)A, or MR-HA 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
FNC155
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
Operand
System user
type
X Y
 
S
1

D
1
D
2
1 : Use a transistor output.
2 : D.b is available only in FX
3 : Only available for FX
4 : Only available for FX
PLC User's Manual - Positioning Control Edition
For items to be observed in programming, refer to Section 4.7.
16-bit
Instruction
instruction
symbol
−
−
S • • •
D D
1 2
Bit device
Digit designation
M T C S D.b KnX KnY KnM KnS T C D
2

 
2

 

and FX
3U 3UC
/FX /FX and FX
3G 3GC 3U
and FX PLCs.
3U 3UC

7 Absolute Position Detection System (Absolute Current Value Read) - ABS Instruction

32-bit
Execution condition
instruction
13 steps
Description
Word device
Special
System user
unit
R U/G V Z Modify K H
 3  4
    
PLCs. However, index modifiers (V and Z) are not available.
PLCs.
3UC
7.1 Instruction Format
examples of connection.
Instruction
Execution condition
symbol
Continuous
DABS
execution
−
type
Data type
S
)
Bit
D
)
1
BIN32-bit
Others
Real Char-
Con-
Index num- acter Pointer
stant
ber string
E ""


 
B - 117
A
B
Apx.
P