YASKAWA VS-626M5 Instruction Manual download pdf (Page 140)

3. PLC Monitoring Function

3.1 Overview

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3. PLC Monitoring Function (PLC Timing Chart Function)

3.1 Overview

PLC monitoring function is used to check the state of mechanical I/O signals.

Ladder diagram shows a specific condition to bring a machine or an NC unit to a

certain state (alarm generation, feed hold, coolant delivery, magazine rotation, tool

clamping, etc.); however, it is usually impossible to know the mechanical I/O

signal at the moment that a condition is given. With this function, it is possible to

know it.

3.2 How to Start Monitoring Function

Select the ‘Diagnosis’ screen and ‘PLC’ in general diagnosis, and press the F8

(finger) key to show the ‘MONITOR’ menu. Press the menu to start the monitoring

function (Fig. 1).

Fig. 1 Time chart screen

Sampling Start ---- When the trigger condition is set, sampling starts.

DISP SLCT ---- Displays the trigger position in such a way to make the

position being 0/29/59 of the scale.

Changes the display position.

SETTING ---- The menus to perform various setups of the timing chart

appear in the case of the operation modes other than

“Ref. Point Return” and “Manual Operation.”

DISP SLCT ---- Selects reference cursor.

Selects three options of “None Selected,” “Ref 1,” and

“Ref 2.”

§ / ¨ ---- Moves to selected cursor position.

☞ ---- Displays other diagnosis menus.

MDI

Mode

DIAG

DATA NUM

TRIGGER

DISP POS

Start

Sampling

Start

SETT

ING

DISP

SLCT

Cursor

Selection

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YASKAWA VS-626M5 Instruction Manual Page 140