Function And Operation - Mitsubishi Electric Melsec-F FX3GC Series User Manual

FX /FX /FX /FX /FX
3S 3G 3GC 3U 3UC
Built-in Positioning Functions
7.2 List of Related Devices
1. Special auxiliary relays
The following table shows the related special auxiliary relays.
Note that Y000, Y001, Y002, and Y003 are devices that determine the pulse output destinations.
For details on PLSY (FNC 57), PWM (FNC 58), and PLSR (FNC 59) instructions, refer to the
Device number
Y000 Y001
*1. Y002 is not available in FX
*2. Y003 is available only when two high-speed output special adapters are connected to the FX
2. Special data registers
The following table shows the related special data registers. Note that Y000, Y001, Y002, and Y003 are
devices that determine the pulse output destinations.
Y000
Low-
D8340
order
High-
D8341
order
*3. Y002 is not available in FX
*4. Y003 is available only when two high-speed output special adapters are connected to the FX
7.3

Function and Operation

Connect an MR-J4A, MR-J3A, MR-J2(S)A, or MR-HA servo amplifier (with absolute position
detection function) manufactured by Mitsubishi to your system, and use this instruction to read out the
absolute position (ABS) data. The data will be converted into a pulse value before being read out.
Command
input
FNC155
DABS
1) For S , specify the first number of the device that inputs the absolute position (ABS) data from the
servo amplifier. Number of occupied points: 3 (
is the "send data ready" signal.)
2) For D , specify the first number of the device that outputs the absolute position (ABS) data control
1
signal to the servo amplifier. Be sure to use transistor outputs for the PLC outputs.
Number of occupied points: 3 (
and D +2 is the "ABS data request" signal.)
1
3) For D , specify the absolute position (ABS) data (32-bit value) storage device number to store the data
2
read out from the servo amplifier. Handle the absolute position (ABS) data as follows:
- To use the built-in pulse output function, be sure to specify the following current value registers for the
read-out ABS data:
Y000
D8341,D8340
*1. Y002 is not available in FX
*2. Y003 is available only when two high-speed output special adapters are connected to the FX
B - 118
PLC User's Manual - Positioning Control Edition
For details on the related devices, refer to Section 4.1 to Section 4.4.
*1 *2
Y002 Y003
M8029 "Instruction execution complete" flag
M8329 "Instruction execution abnormal end" flag
PLC (14-point and 24-point type) and FX
3G
Device number
Y001
Y002
Low-
D8350 D8360
order
High-
D8351 D8361
order
PLC (14-point and 24-point type) and FX
3G
S • •
D D
1
D is the "servo-ON" signal,
1
Y001
D8351,D8350
PLC (14-point and 24-point type) and FX
3G
7 Absolute Position Detection System (Absolute Current Value Read) - ABS Instruction
Function
*3 *4
Y003
Low- Low-
D8370
order order
High- High-
D8371
order order
•
2
S is ABS (bit 0),
*1
Y002
D8361,D8360
7.2 List of Related Devices
programming manual.
Attribute
Read only
Read only
/FX PLC.
3S 3GC
Data Initial
Function
length value
Current
value
32-bit
register
(PLS)
/FX PLC.
3S 3GC
S +1 is ABS (bit 1), and
D +1 is the ABS data transfer mode,
1
*2
Y003
D8371, D8370
/FX PLC.
3S 3GC
Refer to
Subsection
4.4.2
Subsection
4.4.2
PLC.
3U
Refer to
Subsection
0
4.4.1
PLC.
3U
S +2
PLC.
3U