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A negative edge at the enable input disables the counter. The outputs, diag-
nostics bits, and the counter are not reset. You can continue reading the cur-
rent count. A positive edge at the enable input resets the outputs and the diag-
nostics bytes.
If setpoints have been preselected and the counter is enabled, the module
counts the positive edges at the counter input. The count is incremented by 1
with every leading edge.
After setpoint 1 has been reached, output Q0 is enabled. At the same time,
status bit S1 is set. After setpoint 2 has been reached, output Q1 is enabled.
At the same time, status bit S2 is set.
As long as the enable input is active, the counter counts the pulses. After the
enable command has been cancelled, the counter is disabled. The actual va-
lue remains constant.
You can read the current count in the STEP 5 program. The actual value is
displayed as an unsigned whole number and must be in the range of 0 to
65,535.
Note
If no setpoint is preselected, the respective value 0 is assigned. The corres-
ponding output is enabled with the positive edge of the enabled input.
ET 200U Distributed I/O Station
EWA 4NEB 812 6087–02b
Disabling the Counter
Reaching the Setpoints – Setting the Outputs – Resetting the Outputs
Function Modules
9-29
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