Omron CS1W-CT041 Operation Manual page 18

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Digital Input Function
Digital Output Control
Resetting Counter Value
Programmable Output
Pulses
Rate Measurement
Hysteresis
The Unit is equipped with 4 Digital Inputs (I0, I1, I2 and I3) that can be freely
assigned to any Counter. To meet the requirements of your application every Dig-
ital Input can be configured according to one out of 17 available functions. The
functions make it possible to use a Digital Input with Gate-, Preset-, Reset- or Cap-
ture Functionality (among other functions). Refer to 3-4 "Digital Input Functions".
To control the Outputs the Unit can be configured in one of the two following Out-
put Control Modes:
• Range Mode (refer to 3-5-1 "Range Mode")
• Comparison Mode (refer to 3-5-2 "Comparison Mode")
In Range Mode, a configurable number of up to 32 Ranges can be applied to indi-
vidual Counters. Every Range can control up to a maximum of 32 Outputs. An
Output is turned ON when the Counter is in the corresponding Range. In Compar-
ison Mode a configurable number of up to 32 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.
Furthermore Outputs can be controlled manually by setting/resetting PLC soft-
ware bits (refer to 3-5-3 "Manual Output Control"). The Outputs can be configured
to keep their last state or to have a predefined state, in case the PLC-state
changes (RUN/MONITOR → PROGRAM), an I/O Bus error or an Overflow/Under-
flow error occurs. Additionally Outputs can be configured with an NPN- or PNP
Output driver (refer to 3-5-4 "Output Control Configuration").
Resetting of the Counter Value can be freely configured depending on the appli-
cation needs. The following sources can trigger a reset:
• Software bit in the PLC
• Z-Input
• Digital Input (that is configured as a Reset Input)
To enable resetting a Counter Value, an external Digital Input can be configured as
Enable Reset Input and/or the Software Enable Reset bit can be used (refer to
3-6 "Reset Signals").
The timing characteristics of the Digital Outputs can be modified, depending on
the requirements of the application as follows (refer to 3-7-1 "Programmable Out-
put Pulses"):
• Output Turn ON Delay [1 ms to 9999 ms], to delay turning ON an Output
• Output Pulse Duration [1 ms to 9999 ms], to generate an Output pulse of the
specified duration
The ability, for every Counter, to measure the Rate of the incoming pulses within
a predefined time-window [1ms to 9999 ms] enables measuring speeds and fre-
quencies. Rate Measurement is executed as background calculation and can be
enabled or disabled. For every Counter up to a maximum of 64 most recent Rate
Values are available as a Rate History Log File (refer to 3-7-2 "Rate Measure-
ment").
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 3-7-3 "Hysteresis".
Section 1-1
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