User Guide – PERC2000 System Controller
Publication 81-9059-0605-0, Rev. B
November 2010
Proprietary Information of
PESA PESA 8-13
8.9.1.3 PRC Delay
This option specifies the time delay between data messages sent over the proprietary PESA
Router Control (PRC) bus. It applies to PRC, Tiger (TGR), and external (XTN) types of
components. PRC delay values can range from 50 to 100 ms; the default value is 50 ms.
8.9.1.4 Modify Net Filters Button
Functions contained on the Modify Net Filters Button are not used in the current configuration
of the P2K and no data entry is required. This functional area is reserved for future use.
8.9.1.5 Serial Port Configuration
The Serial Port Configuration portion of the System Parameters Window allows you to
configure the serial ports on the P2K System Controller. The entry in the left-most column of
the configuration table identifies the port (1 thru 4) defined by the entries in the associated row.
The following data fields are used for port configuration:
Protocol
This entry identifies the protocol, defining the format used when sending data through the serial
ports on the P2K System Controller. Enter the desired data protocol from the pull-down menu
associated with the table cell. There are currently three protocols available for use:
• CPU Link Protocol 1 with Extensions (P1E) (81-9062-0407-0)
• Unsolicited Status Protocol (USP) (81-9062-0409-0)
• PESA Routing Control (PRC) (81-9062-0316-0)
The number in parenthesis identifies the PESA document that describes the data protocol.
The selection box associated with Port 3 contains only the PRC serial data
protocol. Current revision of the P2K GUI Software has Port 3 fixed as a
PRC Port.
A fourth protocol option is listed in the selection box pull-down list for
ports 1, 2 and 4, labeled P2-Serial. This protocol is not used in the current
revision of the P2K GUI Software, and is reserved for future P2K
implementations.
Checksum
A checksum determines how the validity of transmitted data is confirmed. There are three
available checksum types:
• NONE - No validity checking.
• PESA - Data validity is checked using PESA’s standard method.
(See Protocol documentation.)
• HEX - Data validity is checked using a standard HEX-ASCII checksum.
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