Sentinel does not have a feature to send commands to the scanner, other than reading or writing data to & from the scanner when the scanner is in mass storage mode.
However, if you use ProScan, and have the scanner connected to your PC so that you can log whatever it is receiving, in ProScan, you can send a command to the scanner to put it into mass storage mode, which is the only mode that Sentinel can use to connect to the scanner. In ProScan, you can send a command to have the scanner go into mass storage mode for a specific time frame. Then you can read or wriye prohramming information to or from the scanner via either Sentinel or ProScan.