Mitsubishi Electronics FX3G User Manual

417

/FX

3GC

/FX

3UC

Series

Programming Manual - Basic & Applied Instruction Edition

14 Handy Instruction – FNC 60 to FNC 69

14.9 FNC 68 – ROTC / Rotary Table Control

FN
C30
-FN
C3

ota

tion and

Shi
ft

FN
C40-FN

C49

ata O
perati

FNC

50-FNC

High-Speed

Proc

essing

FM
C60-FN

C69

andy

struction

FN
C70-FN

C79

xternal

I/O

vice

FNC

80-FNC

External

Dev
ice

FNC1
00-
FNC10

Dat
a

Transfer 2

FNC1

10-
FNC139

oati

ng Poi

FNC14

0-F

149

Operation 2

FNC1

50-
FNC159

Pos
itioning

Control

Operation conditions

The conditions required to use this instruction are as shown in the example below.

1) Rotation detection signal: X

→

- Provide a 2-phase switch (X000 and X001) for detecting the rotation direction (forward or backward) of the table

and the switch X002 which turns ON when the product No. 0 reaches the port No. 0.

- Create the sequence program shown below.

2) Specification of a register for counting:

The counter

detects which number of product is located at the port No. 0.

3) Registers specifying the calling condition:

+1 and

a) Set the port No. to be called in

+1.

b) Set the product No. to be called in

+2.

4) Number of divisions m1 and number of low-speed sections m2

Specify the number of divisions m1 of the table, and number of low-speed sections m2.

When the above conditions are specified, forward/backward rotation and high-speed/low-speed/stop are output to

+3 to

+7 specified by the head device

Cautions

1. Operations caused by the command input ON/OFF status

• When the command input is set to ON and this instruction is executed, the result will be automatically output to

+3 to

+7.

• When the command input is set to OFF,

+3 to

+7 are set to OFF accordingly.

2. Multiple activation of the rotation detection signal (

+2) in one division

For example, when the rotation detection signal (

+2) is activated 10 times in one division, set a value

multiplied by "10" to each division, port No. to be called and product No. to be called.
As a result, an intermediate value of the division number can be set to a low-speed section.

3. Zero point detection signal

When the zero point detection signal (M2) turns ON while the command input is ON, the contents of the register for
counting

are cleared to "0".

This clear operation should be executed before starting the operation.

X000

X001

X002

X000 to X002 are replaced with internal contacts of to +2.
An arbitrary head device number can be specified by X or .

Zero point detection switch

2-phase switch

phase

Up-counting signal during forward rotation