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Chapter 7 Usage of Various Functions
7-1
Chapter 7. Usage of Various Functions
7.1 Built-in Functions
7.1.1 High-speed counter function
This chapter describes the specification, handling, and programming of built-in high speed counter of MASTER-K120S. The
built-in high speed counter of MASTER-K120S(hereafter called HSC) has the following features;
Function
Description
Counter format
•
Linear counter : Up/Down counter.
Counting range is from -2,147,483,648 to 2,147,483,647
•
Ring counter : Counter value rotates from 0 to (set value-1)
Counter mode
4 counter functions as followings
•
1-phase operation mode
•
1-phase pulse + direction mode : Up / down is selected by direction pulse
•
2-phase CW/CCW mode : Up / down is selected by CW or CCW pulse input
•
2-phase multiplication mode : Up / down is automatically selected by the phase
difference between A-phase and B.(multiplied by 4)
Preset function
Change current value to preset value.
Latch counter
Latches current value.
Comparison output When current value is equal to comparison value, turns on the output contact points or
executes interrupt program
Additional
function
RPM function
Calculate the RPM(Rotates Per Minute) of input pulse
1) Performance Specifications
Items
Specifications
Standard Type
Economic Type
Points
1 phase : 4 points, 2 Phase : 2 points
1 phase : 2 points, 2 Phase : 1 points
Max. counting speed
1-phase 100kHz/ 2-phase 50kHz ( Ch0, Ch1)
1-phase 20kHz/ 2-phase 10kHz ( Ch2, Ch3)
1-phase 10kHz/ 2-phase 5kHz
( Ch0, Ch1)
Input types
A-Phase, B-Phase, Preset input
Counting ranges
from -2,147,483,648 to 2,147,483,647(Binary 32 bits)
1-phase Up
counter
1-phase Pulse +
direction input
A-Phase : Input pulse, B-Phase : Direction pulse
2-phase
CW/CCW mode
A-Phase : Up counting pulse, B-Phase : Down counting pulse
Up / Down
selection
2-phase
multiplication mode
Auto-select by phase difference of A-phase and B
Additional function
Ring counter, Latch counter, Preset, Comparison output, RPM function
2) Input specification
Items
Specifications
Items
Specifications
Rated input
24VDC (7mA)
Rated input
24VDC (7mA)
On voltage
20.4 ~ 28.8VDC
On voltage
20.4 ~ 28.8VDC
Off voltage
6VDC or lower
On delay time
200
㎲
or lower
A / B phase
Off voltage
6VDC or lower
Preset input
Off delay time
200
㎲
or lower