Chapter 8 High-speed counter, PWM / Pulse train output and Analogue I/O
8-11
(2)
Phase counting mode 1
In this mode the counter counts at the rising edge of input 1A. At this point, if input 1B is 0 (Low) it counts up, and if
input 1B is 1 (High) it counts down.
Figure 8.15 Counting operation of phase counting mode 1
Input 1A
Input 1B
Operation
1 (High)
↑
(Rising edge)
Do not count
0 (Low)
↓
(Falling edge)
↓
(Falling edge)
1 (High)
↑
(Rising edge)
0 (Low)
Up count
0 (Low)
↑
(Rising edge)
Do not count
1 (High)
↓
(Falling edge)
↓
(Falling edge)
0 (Low)
↑
(Rising edge)
1 (High)
Down count
(3)
Phase counting mode 2
In this mode, if input 1B is 0 (Low) at the rising edge of input 1A the counter counts up, and if input 1A is 0 (Low) at the
rising edge of input 1B, the counter counts down.
Figure 8.16 Counting operation of phase counting mode 2
Input 1A
Input 1B
Operation
1 (High)
↑
(Rising edge)
Do not count
0 (Low)
↓
(Falling edge)
↓
(Falling edge)
1 (High)
↑
(Rising edge)
0 (Low)
Up count
0 (Low)
↑
(Rising edge)
Down count
1 (High)
↓
(Falling edge)
Do not count
↓
(Falling edge)
0 (Low)
↑
(Rising edge)
1 (High)
Coincidence
output
On preset
Off preset
Count value
Input 1B
Input 1A
Coincidence
output
On preset
Off preset
Count
value
Input 1B
Input 1A
Summary of Contents for HIDIC MICRO-EH
Page 1: ...HITACHI PROGRAMMABLE CONTROLLER APPLICATION MANUAL NJI 350B X ...
Page 12: ...MEMO ...
Page 14: ...Chapter 1 Features 1 2 MEMO ...
Page 50: ...Chapter 4 Product lineup and wiring 4 18 MEMO ...
Page 196: ...Chapter 5 Instruction Specifications 5 146 ...
Page 263: ...Chapter 11 Communication Specifications 11 10 MEMO ...
