Dnp Serial Channel Attributes - ABB COM600 Series User Manual

5.4.3.
66
COM600 series, Version 5.0
DNP 3.0 Serial Slave (OPC) User's Manual

DNP Serial Channel attributes

Table 5.4.3-1 DNP Serial Channel attributes
Property / Para- Value or Value range/ Default
meter
In Use 0 = Not in use, the channel
communication is stopped
1 = In use
Default: 0
Modem Signal
CTS (Clear To 0 = Passive signal
Send)
1 = Active signal
DCD (Data Carrier 0 = Passive signal
Detect)
1 = Active signal
Diagnostic Coun-
ters (DNP Serial
Channel)
Transmitted Tele-
grams
Description
Data type: Integer
Access: No limitations
The state of the channel - whether it is in
use or not. When a channel is not in use,
no data can be transmitted on it, and no
data is received from it. The channel
attributes can be read as usual. Generally,
a channel must be taken out of use by
setting this attribute to 0 before the chan-
nel attributes can be written.
When a channel is stopped by setting the
In use attribute to 0, all data transmission
on the channel ceases. However, before
that, the protocol stack executes to the
end all on-going data transactions. For
example, the polling of the station in turn
is completed.
Data type: Integer
Access: Read-only
The state of the modem signal - active or
passive. This information is for direct
supervision and control of the state of the
modem signal and communication. These
values are located in an own Modem Sig-
nals node.
Indicates the state of the Clear To Send
(CTS) signal.
Indicates the state of the Data Carrier
Detect (DCD) signal.
Data type: Integer
Access: No limitations
The number of transmitted telegrams.
1MRS755495