Rockwell Automation 1770-KF3 DH-485 Communication Interface User Manual - Manual (Page 28)

Configuring the KF3
Chapter 3
3Ć5
For normal operation, the basic communication parameters must be
configured. For special communication needs, configure the advanced
communication parameters, which permit more flexibility in tuning the
operation of the module.
Important: The KF3 is shipped from the factory with the DH-485 Node
Address set to 00. If there is to be more than one KF3 on the network,
or if a station with this address already exists, you will have to change
this parameter setting. The default settings for the other parameters are
intended to cover most situations, and need only be changed if they do not
meet your requirements.
The basic communication parameters are divided into two groups: those
that control the link with the DH-485 network, and those that control the
RS-232C link with the computer. The parameter number is shown in the
left display, the current setting in the two right displays.
Table 3.B describes each basic communication parameter and its valid
settings. The numbers in parentheses are the factory default values as they
appear in the display.
Table 3.B
Basic Configuration Parameters
Parameter Number Parameter Description Factory Default
DHĆ485 Parameters
DHĆ485 Node Address The address of this node on the DHĆ485 network. Valid station addresses
are 00Ć31. Every station on the DHĆ485 network must be given a unique
station address. If the KF3 detects another station with the same address,
the front panel Fault LED will flash. You should then change this station's
address to an unused one.
For optimum network performance, set your stations to consecutive
addresses, starting at 0. For example, if you have 4 stations, their
addresses should be 0, 1, 2, and 3. This minimizes the solicitation of the
new stations that is required.
(00).
DHĆ485 Baud Rate Sets the baud rate (the speed in bits/second at which data is transferred)
of the DHĆ485 link. Possible rates are 300 (03), 1200 (12), 2400 (24),
4800 (48), 9600 (96), 19200 (19).
Important: All stations on DHĆ485 must be set to the same baud rate.
9600 baud (96).
Diagnostic Command
Execution
Determines whether diagnostic commands are executed directly by the
KF3 (01) or whether they are passed through to the host computer (00).
They are executed by
the KF3 (01).
Basic Communication
Parameters