Fieldbus Communication Parameters
SSW-06 | 21
‘sys_pswd.cfg’ that is located under directory ‘user\pswd\’. Each line of the file has a pair ‘login:password’ that
corresponds to a user account.
In order to change the file containing the user accounts, create, with the assistance of a simple text editor, a file
that contains in each line a pair ‘login:password’. A colon shall separate the two words. Notice that no
password cryptography is available, i.e., the login and the password are completely visible. After
creating/modifying the user accounts, transfer via FTP the file ‘sys_pswd.cfg’ to the directory ‘user\pswd\’.
Example of file transfer through FTP:
NOTE!
The Soft-Starter SSW-06 that comes from the factory has a normal user account:
Username: user
Password: user
Users of the normal security level are restricted to the directory ‘\user’.
In addition to the access control for the file system, there is also an Access control for the HTML pages of the
communication board. The file containing the access passwords is located under the directory ‘user\pswd’, and
it is named ‘web_accs.cfg’. As in the previous case, each line of the ‘web_accs.cfg’ file represents an access
account. In order to change the user accounts for the HTML pages, create a text file with the same name
(‘web_accs.cfg’) and insert in each line of this file a pair ‘login:password’ for the users with access permission.
After that, transfer this new file through FTP to the communication board, exactly as in the previous case.
NOTE!
It is strongly recommended to change all passwords of the EtherNet/IP communication board after
the start-up of the device. The new passwords will be effective only after powering down and up the
Soft-Starter SSW-06.
NOTE!
When the Soft-Starter SSW-06 returns from the off-line state the output values are reset.
2.4 THE MODBUS/TCP NETWORK
Modbus is a data communication protocol used in industrial automation systems. Created in the 1970’s by
Modicon, it is one of the oldest protocols used in automation equipment supervision and control networks.
The Modbus/TCP protocol is an implementation of the Modbus standard over TCP/IP, making it possible the
use of a Modbus message system in an ‘Intranet’ or ‘Internet’ network. Modbus/TCP basically encapsulates in a
simple manner a Modbus frame into a TCP frame.
Modbus/TCP uses the Ethernet (IEEE 802.3) physical layer and a client-server model. The used infrastructure is
the same already used by corporative Ethernet computer networks. This fact increases considerably the control
and monitoring possibilities for equipments connected in networks.
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