Rockwell Automation 1785-Lxxx Enhanced and Ethernet PLC-5 Programmable Controllers - Manual (Page 22)

Publication 1785-UM012D-EN-P - July 2005
1-4 Understanding Your Programmable Controller
PLC-5/30 Controller Front Panel
l
Use this port with ASCII or DF1 full-duplex, half-duplex
master, and half-duplex slave protocols. The port's
default configuration supports processor programming:
one stop-bit
BCC error check
no handshaking DF1 point-to-point
2400 bps
no parity
battery indicator (lights red when the
battery is low)
controller RUN/FAULT indicator (green
when running; red when faulted)
force indicator (amber when
I/O forces are enabled)
channel 0 communication status indicator
(green when the channel is communicating)
channel 1B status indicator (lights green and red)
PLC-5 family member designation
channel 0-25-pin D-shell serial port; supports standard
EIA RS-232C and RS-423 and is RS-422A compatible
Install memory module here
Use these labels to write information about the
channel: communication mode, station addresses, etc.
keyswitch; selects controler mode
channel 1A communication port;
its default configuration is DH+
channel 1B communication port;
its default configuration is remote I/O scanner
Install battery here
8-pin mini-DIN, DH+ programming terminal
connection parallel to channel 1A
channel 1A status indicator
(lights green and red)
Channel 0 is optically-coupled (provides high electrical noise immunity) and can be used with most RS-422
equipment as long as:
termination resistors are not used
the distance and transmission rate are reduced to comply with RS-423 requirements
Configure these 3-pin ports for:
remote I/O scanner,
remote I/O adapter,
DH+ communication
unused
1
1
2
2
2