Chapter 7. Usage Of Various Functions; Built-In Functions; High Speed Counter; Function - LG MASTER-K 120S Series User Manual

Chapter 7 Usage of Various Functions

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

Counter format
Counter mode
Preset function
Latch counter
Additional
Comparison output
function
RPM function
1) Performance Specifications
Items
Points
Max. counting speed
Input types
Counting ranges
1-phase Pulse +
direction input
Up / Down
selection
CW/CCW mode
multiplication mode
Additional function
2) Input specification
Items
Rated input
On voltage
A / B phase
Off voltage
• Linear counter : Up/Down counter.
• Ring counter : Counter value rotates from 0 to (set value-1)
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
Change current value to preset value.
Latches current value.
When current value is equal to comparison value, turns on the output contact points or
executes interrupt program
Calculate the RPM(Rotates Per Minute) of input pulse
1 phase : 4 points, 2 Phase : 2 points
1-phase 100kHz/ 2-phase 50kHz ( Ch0, Ch1)
1-phase 20kHz/ 2-phase 10kHz ( Ch2, Ch3)
A-Phase, B-Phase, Preset input
from -2,147,483,648 to 2,147,483,647(Binary 32 bits)
1-phase Up counter
A-Phase : Input pulse, B-Phase : Direction pulse
2-phase
A-Phase : Up counting pulse, B-Phase : Down counting pulse
2-phase
Auto-select by phase difference of A-phase and B
Ring counter, Latch counter, Preset, Comparison output, RPM function
Specifications
24VDC (7mA)
20.4 ~ 28.8VDC
6VDC or lower
Description
Counting range is from -2,147,483,648 to 2,147,483,647
difference between A-phase and B.(multiplied by 4)
Specifications
Standard Type
Items
Rated input
On voltage
Preset input Off voltage
On delay time
Off delay time
7-1
Economic Type
1 phase : 2 points, 2 Phase : 1 points
1-phase 10kHz/ 2-phase 5kHz
( Ch0, Ch1)
Specifications
24VDC (7mA)
20.4 ~ 28.8VDC
6VDC or lower
200 ㎲ or lower
200 ㎲ or lower