ProSoft Technology MVI71-GSC - Manual (Page 20)

MVI71-GSC ♦ PLC Platform Installing and Configuring the Module
Generic Serial Communication Module
Page 20 of 82 ProSoft Technology, Inc.
January 31, 2008
If the side-connect interface is used, minimum ladder logic is required for data
transfer. The user data files to interface with the module must reside in
contiguous order in the processor. The first file to be used by the interface is the
configuration file. This is file number set in the SC_DATA.TXT file using the
SETDNPSC.EXE program. The following table lists the files used by the side-
connect interface:
File Number Example Size Description
Cfg File N10 300 Configuration/Control/Status File
Cfg File+1 N11 500 Data transferred from the module to the processor
Cfg File+2 N12 500 Data transferred from the processor to the module
Even if the files are not required for an application, they still are reserved and
should only be used for that purpose. The read and write data contained in the
last set of files possess the data transferred between the module and the
processor. The read data file (Cfg File + 1) will contain data received on the
communication port and passed to the module. The write data file (Cfg File + 2)
will contain data passed to the module from the processor to be sent out the
communication ports.
Special care must be taken when defining the files for the side-connect interface.
Because the module directly interacts with the PLC processor and its memory,
any errors in the configuration may cause the processor to fault and it may even
lose its configuration and program. After defining the files and populating them
with the correct data, download the program to the processor, and place the
processor in run mode. If everything is configured correctly, the module should
start its normal operation.
If all the configuration parameters are set correctly and the module is attached to
a network, the module's Application LED (APP LED) should remain off and the
backplane activity LED (BP ACT) should blink very rapidly. Refer to the
Troubleshooting
section if you encounter errors. Attach a computer or terminal
to Port 0 on the module and look at the status of the module using the
Configuration/Debug Menu in the module. Refer to the Configuration/Debug
Port
section for a complete discussion of the use of this feature.
1.8 Module Configuration
In order for the MVI71-GSC module to function, a minimum amount of
configuration data must be transferred to the module. The following table
provides an overview of the different types of configuration data that the module
will require, depending on the operating modes to be supported.
Function Name Description
Data
Transfer General Module
Configuration This section of the configuration data contains the
module configuration data that defines the data
transfer between the module and the PLC processor.
Serial Port
Drivers Port Configuration These sections define the characteristics of each of
the serial communication ports on the module. These
parameters must be set correctly for proper module
operation.