WCS-232_v6.0_User Manual_Eng_DM v1.0.1

WCS-232 v6.0 User Manual
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Appendix D: Troubleshooting
D.1. No Data Transmission
D.1.1. COM Port Settings
- Check if you have set the same baud rate for WCS-232 and host. If you do not know the setting value, initialize it
with the reset button and try again.
WCS-232 only supports 8 data bit. If the host supports 7 data bit, even or odd parity, and only use WCS-232 for both
sending and receiving, use WCS-232 as initial state(8 data bit, No parity). However, it cannot be applied to 7-bit
devices such as USB dongles.
- Please make sure that parity and stop bit of WCS-232 are set to the same as the host. WCS-232 supports
No/Even/Odd parity and 1/2 stop bit.
- Among the control signal lines defined in the RS-232 standard, RTS(Request to Send) and CTS(Clear to Send) are
used for hardware flow or hardware handshaking purpose between two serial devices. Typically, the RTS and CTS
signal lines are connected to the CTS and RTS signal lines of a counterpart equipment respectively.
RTS is an output signal line that tells the other device that it is ready to receive data. For example, if a DTE device
and a DCE device are connected via serial line, the DTC device will make the RTS signal line active to notify the
DCE device that it is ready to receive data. If the receive buffer is full and no longer able to receive data, it makes
the RTS signal line inactive to prevent the DCE device from transmitting data.
CTS is an output signal line that verifies if the data can be sent to the other device. For example, if the DTE device
and DCE device are connected via serial line, the DTE device examines the CTS signal and attempts to send data.
It CTS signal is inactive, it means that there is no room in the receive buffer of the DCE device, so it stops sending
data until the CTS signal becomes active. If the DCE device has room in the receive buffer and makes its RTS signal
active, the CTS signal of the connected DTE device becomes active and DTE device starts to send data to DCE
device.
WCS-232 is basically set to use hardware flow control over RTS and CTS signals. If the device you want to connect
to WCS-232 does not support or disabled the hardware flow control, you must set hardware flow control disabled in
WCS-232. Flow control can only be set with dip switch.
- WCS-232 does not support RS-232 break signal. Therefore, you cannot use it for products that require break signal.