Rockwell Automation 2755 Enhanced Decoder Series B - Manual (Page 165)

12–3 Configuration: Host Communications
Publication 2755-833
Host Protocol
Field Type Options
Select
RS232
RS232 XON/XOFF
RS232 CTS/RTS – 1
RS232 CTS/RTS – 2
RS422
RS422 XON/XOFF
DH485 PCCC – 1
DH485 PCCC – 2
DH485 ASCII – 1
DH485 ASCII – 2
Selects a communication interface and protocol for the HOST port.
The default is RS-232 (with no flow control) the first time the
decoder is started. From then on, operation is determined at restart
by the contents of storage memory.
Other options include:
•
RS232 XON/XOFF uses XON/XOFF flow control
•
RS232 CTS/RTS-1 uses half duplex RTS, CTS and DTR modem
control lines to control the flow of data from the decoder to the
host.
•
RS232 CTS/RTS-2 uses RTS, CTS and DTR modem control lines
for bidirectional (full duplex) flow control between the decoder
and the 2760-RA/RB module (when the module has modem
control enabled).
•
RS422 (no flow control) uses no flow control.
•
RS422 XON/XOFF uses XON/XOFF flow control.
•
DH485 PCCC-1 uses PCCC commands with write replies.
•
DH485 PCCC-2 uses PCCC commands without write replies.
•
DH485 ASCII-1 uses ASCII commands with responses.
•
DH485 ASCII-2 uses ASCII commands without responses.
Device Address
Field Type Options
Edit Numeric
00 through 31
01
Specifies the node address of the decoder if operating as a node on
an RS-485 network. Each node on the network must have a unique
node address from 00 to 31. The default device address for the
decoder is 01 the first time the decoder is started. From then on,
operation is determined at restart by the contents of storage memory.