ProSoft Technology MVI71-GSC - Manual (Page 21)

Installing and Configuring the Module MVI71-GSC ♦ PLC Platform
Generic Serial Communication Module
ProSoft Technology, Inc. Page 21 of 82
January 31, 2008
The MVI71-GSC module must be configured at least once when the card is first
powered, and any time thereafter when the parameters must be changed.
2.1.1 Power Up
On power up, the module enters into a logical loop waiting to receive
configuration data from the processor. Upon receipt and after the module is
initialized, the module will begin communication on enabled ports.
Changing parameters during operation
In order to change any of the module's configuration information, a warm- or
cold-boot operation is required. This will force the module to request the
configuration information from the processor. A warm- or cold-boot request can
be generated by the processor through the ladder logic or through the
Configuration/Debug port of the module.
1.9 Module Data Files
All data related to the MVI71-GSC is stored in user defined data files. The user is
responsible for setting up the data areas to match the specific application for
which the module is used. Each data area is discussed below:
2.1.2 Configuration Data
Configuration of the module is performed by filling in a user defined data table. In
the example ladder logic, file N10 stores the general module configuration
information. Each register in the files has an associated symbol and description
to aid in filling in the data. The Reference chapter lists the items that must be
configured for the module and their associated location in the file. When the side-
connect interface is utilized, the file used for configuration must match that set in
the SC_DATA.TXT file using the setdnpsc.exe program.
Backplane Parameters
The first parameter of the configuration relates to the data transfer between the
module and the processor as follows:
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Backplane Fail - Number of successive transfer failures that cause
communication shutdown.
The Backplane Fail parameter determines if the module should continue
communicating on the serial communication network when the backplane
transfer operation fails. A value of zero indicates that the module should continue
communicating when the backplane is not operational. If the value is greater than
zero, the backplane will be retried the entered number of times before a failure
will be reported and communication will cease on the ports. When backplane
communication is restored, the module will start communicating on the network.
For example, if you enter a value of 10 for the parameter, the module will stop all
communications if 10 successive backplane errors are recognized. When a
successful transfer is recognized, the module will resume communications on the
network.