Rockwell Automation 1770-KF3 DH-485 Communication Interface User Manual - Manual (Page 32)

Configuring the KF3
Chapter 3
3Ć9
Table 3.C
Submenu Configuration Parameters
Parameter Number Parameter Description Factory Default
CTS to Transmit Delay The delay between the CTS signal and the start of transmission by the
KF3 (halfĆduplex only). The delay is from 0 seconds to 0.99 seconds,
in 10 ms (0.01 second) increments. To calculate the delay, multiply the
number in the display by 0.01 seconds.
For example: A setting of 48 means 48 x 0.01 = 0.48 seconds.
This parameter is only required when communicating with the type of
radio modem that requires a delay after exerting the Clear To Send (CTS)
signal. Refer to your modem manual for information on this point.
This parameter only takes effect when the module is in HalfĆDuplex DF1
(local or remote) mode and handshaking is enabled. See Chapter 4,
Communicating with the KF3, for more details of local and remote modes.
No delay (00).
End of Message to
RTS Off
The delay between the end of a message and the KF3 setting RTS
inactive (halfĆduplex only). The delay is from 0 seconds to 0.99 seconds,
in 10 ms (0.01 second) increments. To calculate the delay, multiply the
number in the display by 0.01 seconds.
For example: A setting of 50 means 50 x 0.01 = 0.50 seconds.
This parameter is only required when communicating with modems
that require a delay between sending the last character and raising
the Request To Send (RTS) signal. Refer to your modem manual for
information.
This parameter only takes effect when the module is in HalfĆDuplex DF1
(local or remote) mode, and handshaking is enabled.
No delay (00).
HalfĆDuplex Master
Station Address
The station address of the halfĆduplex master device. This value is in
octal and can range from 00Ć77 inclusive.
This parameter only takes effect when the module is in halfĆduplex remote
mode. See Chapter 4, Communicating with the KF3, for more details of
remote mode.
(10 octal).
Group Number Used in halfĆduplex remote mode to provide a means of addressing more
than 32 DHĆ485 stations from the halfĆduplex link. The group number can
be 00Ć07 inclusive.
Station addresses for DHĆ485 nodes on a multidrop link combine the
group number and the DHĆ485 node address. This parameter only takes
effect when the module is in halfĆduplex remote mode. See Chapter 4,
Communicating with the KF3, for more details.
(00).