My DVM8500 is not responding to commands correctly
The DVM8500 can be controlled in 4 ways; Serial (RS-232), Ethernet, Discrete Inputs, and the front-panel menu interface.
NOTE: First make sure that the file works by reading through the “My video does not play” Article
- A) Serial – The DVM8500 uses a straight-through serial cable and needs a 9600-8-N-1 connection. The player uses ASCII messages to perform actions (more details found in the DVM8500 User’s Guide)
Possible Causes: Wrong cable, wrong serial settings, incompatible USB to serial adapter
Solution: Use AMI Terminal software to control the DVM8500. Retrieve the version of the unit using the software and if you get a response, then connectivity is good. You can also try controlling other functions of the unit. Try a different USB to serial adapter. Check that the syntax of the commands you send are correct.
- B) Ethernet – The DVM8500 needs a 1Mbps or higher Ethernet connection. The Network settings can be configured using the front panel menu or via serial connection using AMI Terminal. The player receives ASCII messages via UDP on port 2638 to perform actions (more details found in the DVM8500 User’s Guide)
Possible Causes: Device on a different network or subnet, duplicate IP address, loose connection, or bad cable.
Solution: Check that the settings (IP, Subnet mask, and gateway) are correct using the front panel knob. Make sure that the green and orange LED lights in the Ethernet port light up. Ping the DVM8500 using Windows command prompt or another third-party pinging utility. Unplug the DVM8500 and ping the unit, if you receive a response then you have a duplicate IP issue. Try using AMI Terminal to control the DVM8500 after confirming the network settings.
- C) Discrete Inputs – The DVM8500 can be triggered using the 8 digital inputs located on the back on the unit. The inputs must be set to the correct type (Voltage or contact) using AMI terminal.
Possible Causes: Input not set to the correct type (voltage or contact closure). Insufficient voltage when operating in voltage mode. Improperly named file (i.e. file number doesn’t match input number).
Solution: If using voltage mode, make sure that you use at least 12VDC to activate the input. Consider using 24VDC for longer cable runs. If using contact closure mode, make sure that no voltage is being applied to the input. Refer to page 38 of the DVM8500 User’s Guide for more details. Follow the “My video does not play” section of this guide.
- D) Front panel knob – The DVM8500 can also be controlled with the front panel knob.
Possible Causes: Wrong file format, old firmware, defective knob
Solution: Upgrade firmware. Follow the “My video does not play” article. If knob is not responding the unit will need to come back for repair to Alcorn McBride.