Table 9: Counter value outlook in detail
Octet Description
1 Bits 0...7 = Counter bits 0…7
2 Bits 0…7 = Counter bits 8…15
3 Bits 0…7 = Counter bits 16..23
4 Bits 0…3 = Counter bits 24...27, Bit 4= sign, Bits
5...7 = Not used
In practice only the energy values from the internal PEMMTR function are pre-
mapped into ASDU 205 values.
Table 10: ASDU 205 pre-mapped values
IEC 61850 object Description FUN INF
LD0.PEMMTR1.SupWh.actVal Reversed active energy 133 51
LD0.PEMMTR1.SupVArh.actVal Reversed reactive energy 133 52
LD0.PEMMTR1.DmdWh.actVal Forward active energy 133 53
LD0.PEMMTR1.DmdVArh.actVal Forward reactive energy 133 54
3.3.6.1 Operation principle
The energy counter values are frozen and propagated as ASDU 205 Class1 events with
timestamp-based on a send criteria, that can be freely defined.
Freezing and sending
The EC_FRZ binary inputs can be seen in the I3CLPRT function blocks through the
Application Configuration tool in PCM600. When a function block detects a rising
edge "1" on the EC_FRZ input, it freezes and latches the defined counter values
among the present IED real time. Thereafter ASDU205 counter events are created into
Class1 buffer.
Some alternatives for EC_FRZ activation
• A common alternative for the operation is that counters should be frozen and
transmitted cyclically, once a minute. This can be achieved in Application
Configuration tool by defining a 1 minute timer that creates a pulse to the
EC_FRZ input. If required it is possible to define other values for the timer, for
example, 10 minutes, 15 minutes, 60 minutes and so on.
• If there are several IEC 60870-5-103 units in the network that should transmit
ASDU 205 values, freezing can be done at the same moment. The timer signal in
one of the units can be connected to a physical binary output signal and wired to
physical binary inputs into the other units. Thereafter, the freezing pulse can be
synchronized in all the units.
• Freezing can also be triggered from the IEC 60870-5-103 master unit. The IED
contains generic control objects like SPCGAPC that can be written from the
master. A generic control object is defined as pulsed type and connected to the
EC_FRZ input with Application Configuration tool. If the generic control object
Section 3 1MRS757647 C
Vendor-specific implementation
22 620 series
Communication Protocol Manual
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