ISPSoft User Manual

Appendix A USB Connection
If the device name corresponding to the PLC connected does not appear in the COM Port
drop-down list box, users have to check whether the device name of the PLC connected is
under Ports (COM&LPT). If the device name of the PLC connected is not under Ports
(COM&LPT), the users have to check whether the PLC is correctly connected to the computer
with the USB cable, and check whether the driver for the PLC is corrected installed on the
computer. After the users make the checks, they have to close the Driver Properties window,
and open the window again.
(6) Click the driver created in the COMMGR window, and then click Start.
*. Please refer to section 2.4 for more information about subsequent tests and the operation of COMMFR.
A.3 Setting the USB Port on a DVP-SX2 Series PLC
The operation of the USB port on a DVP-SX2 series PLC differs from the operation of the USB ports
on other models in that a circuit which converts USB to RS-232 is installed in the DVP-SX2 series
PLC. As a result, the operation inside the DVP-SX2 series PLC adopts RS-232 although the port on
the PLC is a USB port. Users must select RS232 in the Type drop-down list box in the Driver
Properties window if they want to create a driver in COMMGR. The setting of the communication
protocol for exchanging data through the USB port is the same as the setting of the communication
protocol for exchanging data through a general RS-232 port.
Users can set the communication protocol for exchanging data through the USB port on a DVP-SX2
PLC by means of writing a value into D1109. Please refer to the programming manual for DVP-SX2
series PLCs for more information. If users want to create the driver in COMMGR, they have to make
sure that the communication protocol for exchanging data through the driver is the same as the
communication protocol for exchanging data through the USB port on a DVP-SX2.
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