ABB RELION REX640 Technical Manual page 266

Basic functions
Figure 148: Functional module diagram
Pulse counter
This module counts the number of pulses available at PULSE_INPUT. The count value
is incremented depending upon
Table 250: Relation between setting Count criteria and count value behavior
Count criteria values
Rising edge
Falling edge
On change
Freeze
The count value is available at COUNT_VALUE in the Monitored data view and is
stored in a nonvolatile memory. This output is updated cyclically and sent to the
station HMI over various communication protocols, depending on the Reporting
interval setting. The start of
function operation in the protection relay.
Binary output VALUE_READ activates for a fixed 200 ms each time the reporting
timer completes its cycle. It is also possible to update COUNT_VALUE before
completion of
by providing a minimum 1-second-long pulse at READ_VALUE input. Besides
COUNT_VALUE activation, READ_VALUE also activates output VALUE_READ for 200
ms.
The activation of RESET resets COUNT_VALUE to zero. Activation of FREEZE_COUNT
freezes further counting.
Scaling
This module scales the count value available at COUNT_VALUE. The scaling depends
on the
counting,
Pulse quantity setting to calculate the scaled value.
266
PULSE_INPUT
RESET
FREEZE_COUNT
READ_VALUE
Reporting interval and make it available for communication
Count criteria does not reset COUNT_VALUE.
Changing
Unit selection setting. When the function is used for general-purpose
Unit selection is set as "Count" and the count value is multiplied by the
Pulse
Scaling
counter
Count criteria setting.
PULSE_INPUT count value
Count value is incremented on the rising edge of PULSE_IN-
PUT.
Count value is incremented on the falling edge of PULSE_IN-
PUT.
Count value is incremented each time a rising edge or falling
edge is available at PULSE_INPUT.
Counting is frozen.
Reporting interval corresponds to the start of the
1MRS759142 F
VALUE_READ
COUNT_SAT
REX640
Technical Manual