Items To Be Observed In Programming; Positioning Instruction Activation Timing - Mitsubishi Electric Melsec-F FX3GC Series User Manual

FX /FX /FX /FX /FX
3S 3G 3GC 3U 3UC
Built-in Positioning Functions
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).
For information on the pulse output destination devices (hardware) that are affected by programming items,
refer to the following sections.
4.7.1

Positioning Instruction Activation Timing

The following positioning instructions can be programmed as many times 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 the "Note" below.

: For the absolute position detection system, activate the ABS (FNC155) instruction after turning the
power ON for the servo amplifier. After executing this instruction, the current value will be read out from
the servo amplifier only once.
Turning this instruction OFF will turn the servo amplifier OFF.
Caution:
If the "pulse output monitor" (BUSY/READY) flag is on, and if a positioning instruction (excluding the ABS
instruction) or pulse output instruction (PLSR, PLSY) specifies the same pulse output destination device as
the one being used, the instruction cannot be executed.
Even after turning the instruction activation contact OFF, if the "pulse output monitor" (BUSY/READY) flag is
still on, do not execute a positioning instruction (including the PLSR and PLSY instructions) for an output with
the same output number.
Before activating such an instruction, check that the "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
Y000
Y001
Y002
Y003
*1. Y002 is not available in FX
*2. Y003 is available only when two high-speed output special adapters are connected to the FX
PLC User's Manual - Positioning Control Edition
For use of the transistor output of the main unit, refer to Section 4.8.
For use of the high-speed output special adapter, refer to Section 4.9.
For details on the each instructions, refer to Chapter 6 to 11.
Description
Zero return instruction with
DOG search function
Interrupt Positioning
(interruption fixed-feed)
Positioning by batch setting
method
Current ABS value read-out
from servo amplifier
Zero return (without DOG
search function)
Variable speed Pulse Output
Drive to Increment
"Pulse output monitor" flag
*1
*2
PLC (14-point and 24-point type) and FX
3G
Instruction to be used
DSZR DVIT TBL ABS
  
  
  
  
  
  
  
  
For examples of programs, refer to Chapter 12.
M8340
M8350
M8360
M8370
4 Before Programming
4.7 Items To Be Observed in Programming
ZRN PLSV DRVI DRVA

  

  

  
   

  

  

  

  
/FX PLC.
3S 3GC
PLC.
3U
B - 79
A
B
Apx.







