ABB REC 561 User Manual page 507

1MRK 580 140-XEN
Page 6 - 222
3 Design
3.1 General
3.2 Double indication
Event function
As basic, 36 Event function blocks are available in REC 561. Optionally,
eight additional event blocks can be used in REC 561 type 3 (basic +
option 2). In REL 531, six event blocks are available.
Each Event function block has 16 connectables corresponding to 16
inputs EVxx-INPUT1 to EVxx-INPUT16. Every input can be given a
name with up to 19 characters from the CAP 531 configuration tool.
The inputs can be used as individual events or can be defined as double
indication events.
The inputs can be set individually from the Station Monitoring System
(SMS) under the Mask-Event function as:
• No events
• OnSet, at
• OnReset, at
• OnChange, at
Double indications are used to handle a combination of two inputs at a
time, for example, one input for the open and one for the close position of
a circuit breaker or disconnector. The double indication consists of an odd
and an even input number. When the odd input is defined as a double indi-
cation, the next even input is considered to be the other input. The odd
inputs has a suppression timer to suppress events at 00 states.
To be used as double indications the odd inputs are individually set from
the SMS under the Mask-Event function as:
• Double indication
• Double indication with midposition suppression
Here, the settings of the corresponding even inputs have no meaning.
These states of the inputs generate events. The status is read by the station
MMI on the status indication for the odd input:
• 00 generates an intermediate event with the read status 0
• 01 generates an close event with the read status 1
• 10 generates an open event with the read status 2
• 11 generates an undefined event with the read status 3
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