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Protocol X DCA
Configuration Guide
A197-0CG-1.00-2 Restricted
6
Full
Name Range Description
A typical value is 8.
Stop Bits 1 or 2 This parameter specifies the number of framing bits used at the end
of the data bits.
A typical value is 1.
Parity None
Odd
Even
This parameter specifies the type of parity error checking used on
the communication port.
A typical value is None.
RTS Enable Enable
Disable
This parameter specifies whether or not to enable the use of the
Request to Send (RTS) control line.
CTS Enable Enable
Disable
This parameter specifies whether or not to enable the use of the
Clear to Send (CTS) control line.
DCD Enable Enable
Disable
This parameter specifies whether or not to enable the use of the Data
Carrier Detect (DCD) control line.
Rx Message
Timeout
50 .. 2147483647 This parameter defines the total message timeout in milliseconds.
Received messages must be completed in this time frame to be
considered valid responses. Message timeout is measured from the
end of command transmission to the end of the response. Refer to
Table 4 Character Times. A typical value would be 500 character
times.
Inter Char
Timeout
0 .. 2147483647 This parameter specifies the maximum time, in milliseconds, that
may expire between received characters. If this time expires, the
message is considered to be finished. Refer to Table 4 Character
Times. A typical value would be 3 character times.
RTS On Time 0 .. 2147483647 This parameter defines the number of milliseconds to hold RTS on
before beginning transmission. If a modem is not used, this
parameter is ignored. A typical RTS On value would be 15 ms.
RTS Off Time 0 .. 2147483647 This parameter defines the number of milliseconds to hold RTS on
after completion of data transmission. If a modem is not used, this
parameter is ignored. Refer to Table 4 for Character Times.
Typically RTS Off Times are set to 3 character times.
DCD Wait Time 0 .. 2147483647 This parameter defines the number of milliseconds that DCD must
be asserted before data will be accepted by the DCA. If a modem is
not used, this parameter is ignored. A typical DCD Wait time is 0.
VC Param. Indexes A197_VC or
Not Used (-1)
This is an offset into A197_VC (Virtual Connection Table) and is
used for choosing the required virtual connection parameters for this
port. If ‘Not Used’ is selected, Virtual Connection will not be
available for this port.
Duplex Mode Half-Duplex
Full-Duplex
This parameter specifies the communication mode. When the SRU
is configured for Full-Duplex mode, the DCA will expect
unsolicited messages from the SRU device and will disable THE
polling sequence. In this mode, only one SRU is allowed for this
port, thus the Number of SRUs parameter should be set to 1.
When the SRU is configured for Half-Duplex mode, the polling
sequence is enabled and the DCA expects no unsolicited messages.
Multiple SRUs are allowed in this mode.
This parameter also determines the message format used when
transmitting a message.