Connecting Siemens S7-315-2-dp with DSC via PC adapter

[Salvino]

Trying to connect a Siemens S7-315-2-DP to a LabVIEW DSC system using a PC adapter (RS232) 6ES7 972-0CA23-0XA0.
The PC adapter works properly under Step-7 software, on COM1 port, selectable speed 19200 or 38400 baud, MPI address (CPU) 2.
But the Lookout Protocol Driver, using S7_HMI, doesn't connect. The configuration allows only a 9600baud selection, no 19200 or 38400 baud.
And after a while I get this error message: "Protocol error (1): no response from PLC".

How can I solve this problem?
Salvatore Randazzo
salrandazzo@tiscalinet.it

[Zork]

The adapter is able to communicate at different speeds. However, it falls back to its default baud rate of 9600 whenever serial communication is disrupted. Although this behavior can be observed by the fast blinking power LED, there is no way to reconfingure the driver for this ocurrence. Lookout maintains the settings which were originally configured, which would make it impossible to re-establish communications without operator interaction. Hence, we have restricted communication speed to 9600 baud. Also, the communication settings are not configurable. The device will ONLY work with the following settings:

Start bits: 1
Data bits: 8
Parity: ODD
Stop bits: 1