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Programmable Logic Controllers (PLC) FAQ
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Remote PLC Connection
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How do I connect to an Allen Bradley PLC using a US Robotics Modem?
Posted: 26 Dec 02
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Use these settings in the PLC for SLC 5/03 or MICRO1500 LRP channel 0 configuration:
Current communication mode = SYSTEM
System mode driver = DF1 FULL-DUPLEX
User mode driver = ASCII
CH 0 SYSTEM CONFIG
BAUD = 9600
STOP = 1
Duplicate detect = unchecked
Ack time out = 150
SRC DEC ID = 9
Control line = Full-Duplex modem
Parity = none
Error detect = BCC
Nak retries = 3
Enq retries = 3
Embedded responses = Auto-detect
COMPUTER CONFIG
Start RS Linx
Click on Configure Driver
Select RS232 DF1 Devices
Click ADD NEW
Rename it to:
AB_MODEM
Set COM port to MODEM port (usually COM1)
Set Device = SLC-CH0/Micro/Panelview
Set Baud Rate = 9600
Set Station Number = 0
Set Parity = NONE
Set Error Checking = BCC
Set Stop Bits = 1
Click check mark:
USE MODEM DIALER
Click on Configure Dialer
Add a phone number in ADDRESS BOOK
Click OK should DIAL
Also when finished HIGHLIGHT driver
then click on STARTUP
Set Startup to MANUAL
=====================================
STRINGS to SEND TO USR MODEM
****Send these first in HyperTerminal
AT&F0
ATY0
AT&B1&C1&D2&H1&K0&M0&N6&R1&S1&W0
ATB0&W0
ATS0=1&W0
****Then send these NEXT in HyperTerminal
AT&A1
AT&B0
AT&C1
AT&D2
AT&G0
AT&H0
AT&I0
AT&K0
AT&M1
AT&N6
AT&P0
AT&R1
AT&S0
AT&T5
AT&U0
AT&Y1
AT&W0
AT&W1
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