trying to communicate with existing plc

reddywatt

Member
Join Date
Sep 2002
Posts
4
Hello

having trouble getting slc5/03 allen-bradley to communicate with pc.
tried auto configuration
please help
thanks
 
The "phone jack" port requires a 1747-PIC converter. The DB9 port requires a "cross-over" or "null modem" cable (AB part number 1747-CP3). Which port are you trying to use? Quick tip: if you're using the DB9 port and the DF1 driver won't work - try using the PIC driver in RSLinx - even though you're NOT using a PIC converter on this port. Yes, I know it sounds dumb - but try it anyway. You might get lucky.
 
PCMK

If you by chance have a pcmk card and cable #1784-pcm4/b, you can use this combination. Just remember to change network type in driver config. to dh485.
 
Thanks for the reply's

I am using RS232 cable/ it is a homemade cable inwich
pin 2&3 cross
pin 5 straight across
pin 4-6 &1 tie
pin 7&8cross

but the only light on the plc that will flash is the DH485

by the way I am using rslinx lite
 
The SLC 5/03, SLC 5/04, and SLC 5/05 processors can communicate by
means of the RS-232 communication port, channel 0. Channel 0
supports DF1 full-duplex protocol and DF1 half-duplex master and
slave protocol, DH485 protocol, as well as ASCII communications.
Refer to your programming software user manual for information on
configuring the RS-232 communication port, channel 0.
The details of the DF1 protocols can be found in the DF1 Protocol and
Command Set Reference Manual, Publication Number 1770-6.5.16.
Channel 0 provides a minimum of 500V dc isolation between the I/O
signals and the logic ground of the SLC 5/03, SLC 5/04, and SLC 5/05
processors. The channel is a 9-pin D-shell. The table below provides
a description of each of the pins.
The D-shell is the bottom port on the SLC 5/03, SLC 5/04, and SLC
5/05 processors.
Pin Pin Name
1 DCD (Data Carrier Detect)
*2 RXD (Receive Data)
*3 TXD (Transmit Data)
4 DTR (Data Terminal Ready)
*5 COM (Common Return [Signal Ground])
6 DSR (Data Set Ready)
7 RTS (Request to Send)
8 CTS (Clear to Send)
9 NC (No Connection)

Look at Appendix B of this manual:http://www.ab.com/manuals/cp/1747-um011c-en-p.pdf
 
When you goto "autoconfigure" make sure the type of connection is selected to SLC (its the top right hand window) the default is PLC. This caught me out a while ago.
 

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