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Pulse counter logic (PC)
The transmission of the counter value by SPA can be done as a service value, that is,
the value frozen in the last integration cycle is read by the station HMI from the data-
base. The pulse counter function updates the value in the database when an integration
cycle is finished and activates the NEW_VAL signal in the function block. This signal
can be connected to an Event function block, be time tagged, and transmitted to the sta-
tion HMI. This time corresponds to the time when the value was frozen by the function.
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The function can be regarded as a function block with a few inputs and outputs. The
inputs are divided into two groups: settings and connectables (configuration). The out-
puts are divided into three groups: signals (binary), service value for SPA, and an event
for LON.
Figure 199 shows the pulse counter function block with connections of the inputs and
outputs.
SingleCmdFunc
OUTx
SingleCmdFunc
OUTx
INPUT OUT
Pulse length >1s
I/O-module
BIx
"PCxx-name"
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1.Operation = Off/On
2.Cycle time = 30s...60min
3.Analog Event Mask = No/Report
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PulseCounter
BLOCK
INVALID
RESTART
Pulse
TIMIT_VAL
BLOCKED
NEW_VAL
BIM_CONN
NAME
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EVENT
INPUT1
INPUT2
INPUT3
INPUT4
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Pulse counter value:
0...2147483647
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( M_PC_T)
*Identity
*Value
*Time
*Pulse Counter Quality
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371
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