Serial Optical And Rs485 Communication Channel Settings - ABB DNP 670 Series Communication Protocol Manual

1MRK 511 391-UUS A
4.1.1
670 series 2.2 ANSI
Communication protocol manual
tSelectTimeout specifies the maximum amount of time that a select remains valid
before the corresponding operate is received.
The master subnet mask must not be changed unless the master gets its
IP-address dynamically assigned via, for example, DHCP. For details
see, DNP3 TCP/IP mode
tBrokenConTout determines how long a session is active after a TCP/IP connection has
been broken. After that time period the master session becomes inactive and events are
not stored. If the parameter is set to 0, events are stored until the buffers overflow.
tKeepAliveT determines, in seconds, how often the DNP3 master session sends keep-
alive messages. Default is 10s.

Serial optical and RS485 communication channel settings

RS485 specific communication channel settings, RS485GEN
Wiremode determines the wire mode if the device is configured for RS485. RS485 is a
balanced serial communication that can be used in two ways:
• Two-wire
• Four-wire
A two-wire connection uses the same signal for RX and TX, and is a multidrop
communication with no dedicated master or slave. This variant requires however a
control of the output. The four-wire connection has separate signals for RX and TX
multidrop communication with a dedicated master and the rest are slaves. No special
control signal is needed in this case.
BIAS sets the bus bias to Enabled or Disabled.
Operation selection for RS485 and optical serial communication,
OPTICALPROT and RS485PROT
ProtocolSel selects if the communication in RS485 and optical serial modes happens
via DNP or IEC 103 communication protocol. It can be Disabled via Parameter Setting
tool or local HMI.
DNP3.0 for optical RS-232 and EIA-485 communication protocol,
OPTICALDNP and RS485DNP
BaudRate specifies the baud rate on the serial.
DLinkConfirm determines when the stack should ask for link layer confirmations.
Since DNP3 supports breaking an application layer message into multiple link layer
Section 4
DNP3 parameters
GUID-E86643AC-2771-47CE-89D7-7FC9F47ED9E1 v3
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