Mitsubishi Electric MELSEC FX3U Programming Manual page 436

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
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.
X000
X001
X002
X000 to X002 are replaced with internal contacts of
An arbitrary head device number can be specified by X or
2) Specification of a register for counting:
The counter
3) Registers specifying the calling condition:
a) Set the port No. to be called in
b) Set the product No. to be called in
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 D D
1
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
D D
• When the command input is set to OFF,
2. Multiple activation of the rotation detection signal (
For example, when the rotation detection signal (
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
This clear operation should be executed before starting the operation.
434
D D
1
M0
M1
M2
D S detects which number of product is located at the port No. 0.
1
+3 to D D +7 specified by the head device
1
+3 to +7.
D D
1 1
D
D
1
are cleared to "0".
D S
1
2-phase switch
D
A
phase
+1
D
B
phase
+2
D
Zero point detection switch
D D
to +2.
.
D
D S
1
+1 and
D S D S
1 1
D S +1.
1
D S +2.
1
D D
1
D D +3 to D D +7 are set to OFF accordingly.
1 1
D
D
1
to +2) is activated 10 times in one division, set a
D D D D
1 1
14 Handy Instruction – FNC 60 to FNC 69
14.9 FNC 68 – ROTC / Rotary Table Control
Up-counting signal during forward rotation
+2
.
D
D
to 1 +2) in one division