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Uploading and Downloading Files
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5.2 Uploading Files to a Host
Before initiating your first upload:
H Install an HTTP server on the host machine and configure it as described in
Section 5.1.
H Copy the program DWNLD.EXE from the host software diskette to the HTTP
cgi--bin directory you have configured on the host machine:
<drive:>\<http_root_directory>\cgi-bin
5.2.1 Upload Overview
The bridge configuration is stored in two files, WATTCP.CFG and RTE.CFG, each
of which can be uploaded to a host. To upload a file, write the host URL and
filename as data to register 11 in the bridge. After the upload, the status of the
upload will be stored in the file MODICON.LOG in the host cgi--bin directory.
5.2.2 Initiating an Upload
You can initiate the host upload from a TCP/IP node or Modbus Plus node.
H From a TCP/IP node, address the bridge at its IP address and use a
destination ID (Modbus device address) of 255. The bridge reserves
address 255 to invoke an upload operation between the host and bridge.
H From a Modbus Plus node, address the bridge at its Modbus Plus address
and use an address of 0 (zero) in the third routing byte. This specifies that
the bridge is to perform an upload to a host machine.
Figure 19 Example: Addressing from Modbus Plus for Host Uploading
12 8 0 0 0
Bridge
Modbus Plus
Address
Bridge
Path
Specifies
host
upload
operaton
Not
Used
Not
Used