PISTON 3601510 - Caterpillar

Illustration 32 g01265148
In this example the PL1000T is transmitting an advanced broadcast list 1 composite data and an events and diagnostics command.If the data window remains blank and the status message shows "Connected" a command can be sent to the PL1000T. The command will cause the PL1000T to transmit a response which will serve to verify a valid direct communication link.The command string that must be sent is "500124040061AA86F3". The command string will force the PL1000T to respond with its level 3 password. The level 3 password verifies that a valid direct connection exists.Open an instance of "notepad.exe". Enter the command string exactly as shown in Illustration 32. Once the string is entered into notepad highlight the string using a mouse. Copy the string to the clipboard.
Illustration 33 g01265152
Once the selected command string is highlighted and is copied into the clipboard click the "Edit/Paste to Host" function from the menu bar. Press the "Enter" key. If the direct connection to the PL1000T is valid the command string will appear. Also a response will appear that contains the level 3 password for the PL1000T.If sending the security level request command string 500124040061AA89F3 does not illicit a response from the PL1000T then the connection is suspect. After confirming that power is applied to the PL1000T that the PL1000T is operating correctly and the HyperTerminal program indicates a "Connected" status any failure to receive data responses will be isolated to the physical connection.Connection to a Modem
When the PL1000T is connected to "Data Communications Equipment" (DCE) devices a "Null Modem" cable or an adapter is not required. A printer or a modem are examples of a DCE device.When connecting the PL1000T to a modem handshaking and ring indication is required. The" Data Terminal Ready" (DTR) "Data Carrier Detect" DCD and "Ring Indicator" (RI) lines must be properly connected as shown in Illustration 34.
Illustration 34 g01265126
Perform the following procedure in order to initialize communication with the PL1000T and the "Answering Modem". The "Originating Modem" is set up later by the PC software.Note: In the following steps the PC and the modems should be turned OFF before changing the cables on the serial ports. When power is reapplied the modem must be powered up first.
The PL1000T should be installed with all of the wiring. Refer to the "System Schematic" section of the document.
Determine the parameters that are needed for communication for the installation. The RS-232 default rate communication (bits per second or bps) is 9600. The remaining default settings from the factory are no parity 8 data bits and 1 stop bit. These parameters will work well in most installations. Use the Operation and Maintenance Manual "Communication Parameters-Identify" to determine the parameters of communication that are stored.Note: The RS-232 serial port communication baud rate is often referred to as the DTE speed. The phone port communication rate is often referred to as the DCE speed.
Table 29
Typical Answering Modem Setup Commands    
Item     Explanation     Command Example    
A     Set the modem to the factory defaults.