15
6619-2202
… Frequently used settings for PLC-systems
Most PLC-systems and other industrial applications where modems are used require the
same changes to the standard settings.
The most commonly encountered problems concern speed, parity and control signals
from the connected equipment.
If this action does not solve the problem the modem’s answering codes and possible
echoing of commands might be the source of the difficulty.
Below follows a list of commands that might resolve the problems. The commands may
of course be placed on one single command line if desired.
Configure the TDW-33 connected to the PLC
PSTN
Network
AT&F Set the unit to factory default.
ATV0 Gives the answering codes in short format. (digits)
ATQ1 No result codes are sent on the RS-232/V.24 connection.
ATE0 Commands that are sent from the terminal/computer etc. are not echoed
back to the RS-232/V.24 connection.
AT&C1 DCD will follow the carrier on the line.
AT&K0 No hand shaking.
AT&A1 Character abort option on.
AT&W Store default settings.