Technical Reference Capstone Remote Monitoring System (User Edition)

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Capstone Turbine Corporation  21211 Nordhoff Street  Chatsworth  CA 91311  USA CRMS (User Edition – Chapter 14: Command Line Control) Command Structure The communications interface is a query- response from a prompt message, with the external device providing the query to the Power Controller. Each query is in the form of a message. A typical message contains a command, an optional turbine identification number, and command arguments. Arguments provide additional information to process the command. The command syntax provides for multiple units operating as a single package. The command structure is as follows: o Controller Response The controller response area on the Control Line Command panel displays the commands sent to and responses from the MicroTurbine. When communicating to the MicroTurbine real-time, the ALLDAT command is sent by CRMS, and the response string is displayed. o Send Message To send a command to the MicroTurbine Controller, enter the command in the Send Message field. The response will be displayed in the command response window. All operator commands are saved and can be resent by selecting them from the pull-down menu located on the right- hand side of the Send Message field. By placing the cursor inside the Send Message field and pressing the left arrow key, the operator can display the previously sent commands, starting from the most recently sent. Pressing the right arrow key will display commands in opposite direction towards the last sent command. By pressing the Enter key, the displayed command will be sent. The operator can clear all operator- sent commands by selecting Clear List control from the pull-down menu. o Clear Display To clear the controller response window, select the Clear button. o Record Comm to File To record communication data to a file. This item is available for Depot version only. o Test Port To test communication, select the Test button. If connected and communicating, the controller will respond with a prompt. o Acquire Real-time Data This switch turns ON and OFF Real-time Data Acquisition (ALLDAT) command to observe manual commands. o Comm Error LED This LED will turn red when there are errors in the communication with the MicroTurbine Controller while ALLDAT commands are being sent. Page 14-2 [,] [=] where,  = 6 ASCII characters identifying the function to execute  = the turbine number (use 0 for now  = the sequence of ASCII text supplied to the . For example, in order to command 30 KW (30,000 Watts), the following command is issued: PWRDMD = 30000 And, the response string is as follows: PWRDMD,0=3.0000e+04 Notice that all non-printing characters, including carriage return, line feed, space and tab characters, are ignored by the Power Controller. Contact Capstone Technical Support for information regarding the Capstone RS-232 Query Protocol. Control Line Command Panel Control commands can be monitored and issued from the Control Line Command panel. See Figure 14-1. To display the Control Line Command panel, select the following: [Communication][Command Line] from the MicroTurbine Menu Bar. Be sure to contact Capstone Technical Support prior to issuing Control Line commands. A qualified Service Representative will provide you with any assistance you may require. 410013 Rev H (December 2008) Capstone reserves the right to change or modify, without notice, the design, specifications, and/or contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction.

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