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FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
14 Handy Instruction – FNC 60 to FNC 69
14.9 FNC 68 – ROTC / Rotary Table 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 +2
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 ( to +2) in one division
For example, when the rotation detection signal ( to +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.
D
1
D
X000
M0
X001
M1
X002
M2
D
D
D
+1
+2
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
B
phase
A
phase
Up-counting signal during forward rotation
D
D
D
D
1
S
D
1
S
D
1
S
D
1
S
D
1
S
D
1
S
D
1
D
D
1
D
D
1
D
D
1
D
D
1
D
D
1
D
D
1
D
D
1
D
D
1
D
D
1
D
D
1
D
D
1
D
D
1
S