Items To Be Observed In Programming; Positioning Instruction Activation Timing - Mitsubishi MELSEC-F FX3U Series User Manual

FX /FX Series PLC User's Manual - Positioning Control Edition
3U 3UC
Built-in Positioning Function
4.7

Items To Be Observed in Programming

This section describes various programming items that will not be affected by any pulse output destination
devices (hardware).
In other sections, the programming items that will be affected by the pulse output destination devices are
described. Also refer to these sections.
4.7.1

Positioning Instruction Activation Timing

The following positioning instruction can be programmed as much as needed. However, observe the items
shown in the following table to determine the instruction activation timing.
DSZR(FNC150)
DVIT(FNC151)
TBL(FNC152)
ABS(FNC155)
ZRN(FNC156)
PLSV(FNC157)
DRVI(FNC158)
DRVA(FNC159) Drive to Absolute
: If the pulse output destination device is now outputting pulses, the instruction cannot be activated. Refer
to "Note" below.
: For absolute position detection system, activate ABS (FNC155) instruction at turning-on the servo
amplifier at power-on. After execution of this instruction, the current value will be read out from the servo
*1
amplifier only once.
Turning off this instruction will turn off the servo amplifier
*1. ABS (FNC155) instruction can be used for absolute position detection system of the MELSERVO-J3,
-J2(S), and -H Series.
Caution:
If "pulse output monitor" (BUSY/READY) flag is on, and if the positioning instruction (excluding the ABS
instruction) or the pulse output instruction (PLSR, PLSY) uses the same pulse output destination device,
the instruction cannot be executed.
Even after turning off of the instruction activation contact, if "pulse output monitor" (BUSY/READY) flag is
still on, do not execute the positioning instruction (including PLSR and PLSY instructions) for the same
output number.
Before activating such an instruction, check that "pulse output monitor" (BUSY/READY) flag is off, and
then wait until 1 cycle or more of operation has been completed.
Pulse output destination device
*1. Y003 can be specified as the pulse output destination only if two FX
connected to the FX
→ To use the transistor output of the main unit, also refer to Section 4.8.
→ To use the high-speed output special adapter, also refer to Section 4.9.
Description
Zero return instruction with
DOG search function
Interrupt Positioning
(interruption fixed-feed)
Positioning by batch setting
method
Current ABS value read-out
*1
from servo amplifier
Zero returnzero return (without
DOG search function)
Variable speed Pulse Output
Drive to Increment
"Pulse output monitor" flag
Y000
Y001
Y002
*1
Y003
PLC.
3U
4.7 Items To Be Observed in Programming
Instruction to be used
DSZR DVIT TBL ABS
*1
.
→ For examples of programs, refer to Chapter 12.
M8340
M8350
M8360
M8370
-2HSY-ADP adapters are
3U
4 Before Programming
ZRN PLSV DRVI DRVA
B - 57
A
B
Apx.