ProSoft Technology MVI71-MCM - Manual (Page 81)

Reference MVI71-MCM ♦ PLC Platform
Modbus Communication Module
ProSoft Technology, Inc. Page 81 of 111
December 28, 2007
If you see the status as running, you will not be able to use this com port for
anything other than communication to the processor. To stop the driver press
the "Stop" on the side of the window:
5 After you have stopped the driver you will see the following:
6 Upon seeing this, you may now use that com port to connect to the debug
port of the module.
Note: You may need to shut down and restart your PC before it will allow you to stop
the driver (usually only on Windows NT machines). If you have followed all of the
above steps, and it will not stop the driver, then make sure you do not have RSLogix
open. If RSLogix is not open, and you still cannot stop the driver, then reboot your PC.
5.3.2 RS-232
When the RS-232 interface is selected, the use of hardware handshaking
(control and monitoring of modem signal lines) is user definable. If no hardware
handshaking will be used, the cable to connect to the port is as shown below: