Unsolicited Status Protocol (Pesa USP)
The primary medium for the USP is an asynchronous full-duplex connection that is usually run over RS-232 or RS-422 (this is dependent upon the control system). Data is transmitted over the bus asynchronously. The data is sent at user selectable baud rate (default to 38.4 K Baud) with 1 start bit, 8 data bits, no parity, and 1 stop bit. The default method of handshaking is RTS-CTS control though some controllers may allow for methods such as XON-XOFF.
If you want to use a high communication speed (for example, 38,400 baud), you should use this driver. However, be really careful because this protocol is label-based and you must correctly define all the physical source and destination labels in Router Manager in order to make this driver work properly. This driver does not use checksum.
With firmware version 3.3 and earlier, SD commands must be sent with a comma before the terminator.
NOTES: |
• The Pesa USP driver supports Matrix Controller firmware version 3.3 and earlier. |
• Every physical router destination label defined in XEdit must match a destination label specified in the Pesa router’s configuration. |
• This driver does not support checksums. To turn off the checksum, open PERC2000 (version 2.1), click System Parameters, and then set the checksum options to NONE for every port. |
• If your Pesa router has an older controller card that was upgraded to the PERC2000 software, the USP filtering could be enabled even if the configuration file indicates that it is not. If you notice that UMD statuses do not reflect crosspoint changes immediately, try enabling all filtering on the router, and then disabling all filtering. In some cases enabling filtering of all unsolicited status from the router will be necessary. |
• Grass Valley’s Router Control Software cannot communicate with the router when RTS‑CTS flow control is enabled. |
• In the 3500+ series controller for the Pesa router, RTS-CTS is enabled at the hardware level and cannot be disabled. In the case of PERC2000 controllers, flow control is optional and configured in the PERC2000 Software. |
• Level or Frame ID designation in Router Manager or XEdit must be set to 1 when controlling a single Pesa router. Increment by 1 if there are multiple routers to be configured. |
• You must use RS-232 communication to communicate to the router. |
• In some instances, after a reboot of the router or the KX/iControl, the mnemonics will not update on the KX/iControl display automatically. Making a crosspoint change to the router will cause an update to occur. |