Simple Counter - Omron CJ1W-CT021 Operation Manual

Counter Types
3-2-1

Simple Counter

Simple Counter Function
Outline
Simple Counter
Configuration
48
The advantage of using a Counter as a Simple Counter is that you do not have to
make any DM-configuration settings. Instead, all default DM-settings are used. As
a consequence Simple Counters can only be used in a default configuration. If you
intend to use the High-speed Counter Unit only with Simple Counters the informa-
tion as described in this section "Simple Counter", covers all the default features
and functions that are important and available to you.
If you want to use all the available features and functions of the High-speed Coun-
ter Unit you must configure a Counter not as Simple Counter but as Circular or Lin-
ear Counter. For detailed information on Circular and Linear Counters refer to 3-
2-2 "Circular Counter" and 3-2-3 "Linear Counter".
Function
Counter operation
Counting range
Counter mode
Counting speed
Gate open/close
External outputs
Output form
Reset
IORD/IOWR
The following features and functions are supported for Simple Counters in a
default configuration:
•
A Simple Counter can count up and down over the full (32-bits) counting range
(comparable to a Linear Counter, refer to 3-2-3 "Linear Counter").
•
By using CIO-bits the Counter Value of a Simple Counter can be Preset, Reset
or Captured and the Gate can be Opened or Closed to allow counting pulses
or not.
•
Only Phase Differential (multiplication x1) Signals can be connected to a Sim-
ple Counter. The Z-signal cannot be used to trigger a Reset, only its status is
reported in CIO (and can be used to trigger a reset indirectly via the PLC lad-
der-program).
•
The Noise Filters for the Simple Counter and the Digital Inputs are fixed at
50 kHz. This means that the maximum frequency of the count pulses up to
50 kHz is guaranteed.
•
The Digital Outputs of the High-speed Counter Unit can only be controlled
manually using the corresponding bits in CIO.
•
The Digital Inputs and Outputs can generate Interrupts if Interrupts have been
enabled (in a mixed configuration with Simple/Circular/Linear Counters).
•
The two Digital Outputs use an NPN-Output Driver.
Specifications
Linear
80000000 to 7FFFFFFF
Phase difference, multiplication x1
50 kHz
Internal bits
Forced ON/OFF only
NPN
Internal bits
Reading capture value
Reading/writing count value
Clearing errors
Section 3-2
H