Chapter 7 Usage of Various Functions
7-
5)
Wiring instructions
A high speed pulse input is sensitive to the external noise and should be handled with special care. When wiring the built-
in high speed counter of MK80S, take the following precautions against wiring noise.
(1)
Be sure to use shielded twisted pair cables. Also provide Class 3 grounding.
(2)
Do not run a twisted pair cable in parallel with power cables or other I/O lines which may generate noise.
(3)
Before applying a power source for pulse generator, be sure to use a noise-protected power supply.
(4)
For 1-phase input, connect the count input signal only to the phase A input; for 2-phase input, connect to phases A
and B.
6)
Wiring example
(1)
Voltage output pulse generator
Pulse Generator
CHSC
A
B
COM
24V
24VG
(2)
open collector output pulse generator
Pulse Generator
CHSC
A
B
COM
24V
24VG
Pulse Generator
