26
Operating Modes
Section 4-1
4-1
Operating Modes
The High-speed Counter Unit can operate in any of the following seven
modes selected with the rotary switch on the front panel of the High-speed
Counter Unit. The modes other than the simple counter modes are classified
according to the function.
Drum Function
Linear mode
Circular mode
Preset Function
Preset mode
Counting Function
Gate mode
Cumulative gate mode
Sampling mode
The following pages provide information on data area allocation for value set-
tings and functions of set values.
Note
The High-speed Counter Unit in simple counter mode does not use any set
value. For the data area allocation of the High-speed Counter Unit in simple
counter mode, refer to
5-1 DM Area Allocation in Simple Counter Mode
.
MODE
Operating mode
Function
Page
0
Simple Counter
Mode
Counts the number of input pulses within a range of –8,388,608 to 8,388,607.
---
1
Linear Mode
A total of 16 ranges with upper and lower limits between –8,388,608 and
8,388,607 can be set and when the count value is within one of the ranges, 8-
point signals can be output.
29
2
Circular Mode
A total of 16 ranges with upper and lower limits between 0 and 65,535 can be
set and when the count value is within one of the ranges, 8-point signals can
be output. The number of pulses from 0 to 65,535 is counted. The count value
is reset to 0 after it reaches the maximum countable value set and the High-
speed Counter Unit continues counting the number of pulses.
31
3
Preset Mode
Counter value is decremented beginning with a preset value whenever a
counter input is turned ON. Both counters 1 and 2 have three external outputs
that will be turned ON and OFF while the count is decremented and an external
output that will be turned ON when the High-speed Counter Unit finishes count-
ing down the number of pulses. A total of 20 values can be preset within a
range of 1 to 8,388,607, any of which can be used with the High-speed
Counter Unit in this mode.
33
4
Gate Mode
Counts the number of pulses within a range of –8,388,608 to 8,388,607 while
control input IN1 is turned ON. The High-speed Counter Unit resets the count
value at the rising edge of control input IN1. An external control input or an IR
bit can be used as the control input.
36
5
Cumulative Gate
Mode
Counts the number of pulses within a range of –8388,608 to 8,388,607 while
control input IN2 is turned ON to accumulate the count value. The High-speed
Counter Unit resets the count value at the rising edge of control input IN1. An
external control input or an IR bit can be used as the control input.
37
6
Sampling Mode
Counts the number of pulses from the rising edge of control input IN1 within a
range of –8,388,608 to 8,388,607 for a preset interval. An external control input
or an IR bit can be used as the control input.
37
Summary of Contents for C200H-CT021
Page 1: ...C200H CT021 High speed Counter Unit Operation Manual Revised December 2000 ...
Page 2: ...iv ...
Page 4: ...vi ...
