•The communication port does not exist on the PC running the DDE Server. Reconfigure topics that are configured with this port to another port. This problem may be caused by improper configuration of the RS- 485 card driver (if you are using some special multiport card). Please refer to the card driver’s configuration manual.
•The port is already being used by another application. Close any other applications on the machine and restart the Server.
•The port may not be working. Test the port with a communication program such as HyperTerminal.
No Write to Individual Discrete Bits
The client tried writing to individual bits of a read/write register, which is not allowed.
Open comm for <comm port> failed
This error may be followed by one of the following error messages:
•Invalid or unsupported ID <comm port> — The port is not supported or the port ID is bad. Check the ID of the port to which the devices are connected and reconfigure the topics with the correct port ID.
•Device already open <comm port> — Try restarting the Server. If the problem persists, the port may be in use by another application.
•Device not open <comm port> — Try restarting the Server.
•Unable to allocate queues — Try restarting the Server.
•Error in default parameters — The default parameters set for the port in the DDE Server configuration or other programs are bad.
•Hardware not present or already allocated <comm port> — Port hardware is not available. If there is a communication
•Invalid byte size — The byte size is invalid.
•Unsupported baud rate — The baud rate that was programmed is not supported by the communication port. Please refer to the communication port hardware reference for supported baud rates.
•Unknown error from OpenComm: <error code> — Try restarting the Server.
RegFormat Name is INVALID
The register name(either as mnemonic equivalent or as item name) is not valid.
Retrieve command time not occurred <device name>
This error occurs when the Waveform client sends the RetrieveWFC command very soon after it has sent the TriggerWFC command. Introduce a small delay (approx. 5 seconds) before issuing the RetrieveWFC command to the Server. This will allow the device to collect waveform data properly.
RetrieveWFR : Got out of range values for depth, range is 1-3
DDE Server User’s Guide | Chapter Five - Troubleshooting • 63 |
