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Capstone Turbine Corporation 6025 Yolanda Avenue Tarzana, CA 91356 After completion of the maintenance port initialization interactive user port communications commences with the transmission of the following text: “Software Version X.XX” “USR>” 1.3.5 User Password Levels Password levels available on the user and maintenance ports for provide security at two levels: Base Protected USR> MNT> USRPRT> MNTPRT> Table 6 - Password levels and prompts Capstone Password Level User Port Prompt Maintenance Port Prompt When powered up the user and maintenance ports boot into the “Base” level. No password is required to operate basic data acquisition commands. To transition to the “Protected”, enter the corresponding password. Each system then has a user-defined password that grants “Protected” password level authorization. The default user password “USR123P” is programmed into the system at manufacturing. At the “Protected” level the user has access to system control functions (starting and stopping) protecting operation of the machine via the RS232 user port through casual access. 1.3.5.1 User Prompts Display Password Level On the user port there is a standard default prompt of “USR>” that specifies “Base” level security is active and no password has been issued. Issuing the protected level password and verification transitions the user port to the “Protected” level where a “USRPRT>” prompt is displayed. The maintenance port has a standard default prompt of “MNT>”. Issuing the protected level password and verification transitions the maintenance port to the "Protected" level where a "MNTPRT>" prompt is displayed. 1.3.6 Modem Operation 1.3.6.1 Hayes AT Compatible Command Set The DPC supports HAYES compatible modem communications on both the user and maintenance port. 1.3.6.2 Data Carrier Detect When Data Carrier Detect (DCD) is asserted DPC software assumes no modem is connected and automatically begins to communicate is if it were directly connected to a PC serial port. Absence of Data Carrier Detect (DCD) places the software in a mode where it begins to query for a modem. With DCD not asserted the controller software will periodically send an “AT” command until the modem responds with “OK”. Once this is received controller software proceeds to transmit the modem initialization string. The modem is ready once controller software receives an “OK” command from the modem; otherwise the software begins to poll with an “AT” command again. 1-6PDF Image | Engineering Specification Communication Protocol
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