3
Features and Functions
Section 1-1
ware Outputs. An Output is turned ON when the Counter is in the correspond-
ing Range.
In Comparison Mode a configurable number of up to 8 Comparison Values
can be applied to individual Counters. Depending on the direction of counting,
an Output can be set or reset (configurable) on reaching the Comparison
Value. Every Comparison Value can control up to maximum 32 Outputs.
Resetting Counter Value
Resetting of the Counter Value can be configured depending on the applica-
tion needs. The following sources can trigger a reset:
• CIO bit in the PLC
• Z-Input
To enable resetting a Counter Value, the Software Enable Reset bit can be used
(refer to section
).
Hysteresis
For Counters in Range Mode a hysteresis can be configured [1 to 255
counts], to prevent Outputs from toggling due to unwanted oscillating of
encoding equipment (e.g. rotary incremental encoder). Refer to section
Noise Filtering
For the purpose of suppressing noise on the signal lines A, B of every
Counter, noise filters are provided. The cut-off frequencies for all signal lines
A and B are fixed to 100 kHz.
Run-time Configurable
Configuration settings of the Unit can be changed at Run-time by using the
IOWR-instruction to be able to quickly adjust to changing application needs
without the need of restarting the Unit or stopping the Counters. Care, how-
ever, must be taken when changing configuration settings. Refer to section
for information.
Interrupt Support
All Outputs can be configured to generate interrupts to the PLC. Generating
interrupts is only possible when the Counter Unit is mounted in a CPU-rack.
Support Software
The Unit can be configured by using CX-Programmer Support Software or a
Programming Console.
Quick Start Up Reference
Guide
For a quick overview of all the features and functions the Counter Unit offers,
refer to section
1-4 Quick Start Up Reference Guide
. This section also con-
tains references to the particular section(s) in the Manual where more detailed
information about specific features and functions of the Counter Unit can be
found.
