Absolute Position Detection System (Absolute Current Value Read) - Abs Instruction; Instruction Format - Mitsubishi Electric FX3S Series User Manual

FX /FX /FX
3S 3G 3GC
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
ABSOLUTE
Command
input
2. Data setting
Operand type
3. Devices
Operand
type
S
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
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/FX /FX PLC User's Manual - Positioning Control Edition
3U 3UC
16-bit
instruction
ABS
FNC155
S •
D
1
DABS
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
Bit device
System user
X Y M T C S D.b KnX KnY KnM KnS T C D
2

   
1 2
 
 
/FX
3G 3GC
and FX
3U
search engine
For items to be observed in programming, refer to Section 4.7.
Instruction
Execution condition
symbol
−
−
• •
D
2
Description
Word device
Digit designation System user
     
and FX PLCs. However, index modifiers (V and Z) are not available.
3U 3UC
/FX and FX PLCs.
3U 3UC
PLCs.
3UC

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

examples of connection.
32-bit
Instruction
instruction
symbol
DABS
13 steps
−
S
)
Con-
Special
Index
unit stant
R U/G V Z Modify K H


 3  4
 
7.1 Instruction Format
A
B
Apx.
Execution condition
Continuous
execution
type
Data type
Bit
D
)
1
BIN32-bit
Others
Real Char-
num- acter Pointer
ber string
E "" P
B - 117