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Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Advanced Power Server (APS): User’s Manual The APS-CRMS PC software and the APS controller software are a matched set and cannot be intermixed or the APS will not operate correctly. Because of this the APS-CRMS software should always be used to download new APS controller software to avoid a version mismatch. APS Modbus Master and Slave Register Configuration The APS controller is equipped to act as a slave device on an RS485 Modbus communications bus to allow it to be monitored and controlled by external building management equipment. This Modbus’s register map setup is fully configurable and is explained in detail in one of the following sections. Additionally the APS controller has an internal RS485 Modbus communications bus to allow it to gather and pass information to/from the internal PLC that is used to communicate with slave Modbus devices. This interface will not need to be configured unless you are using the local balance of plant monitoring and control functionality of the APS controller. If this is the case, the register setup will need to be configured in the APS to match the requirements of your site. Details of how to set up the Master Modbus registers are also detailed below. APS Controller Register Setup for External Modbus Connection Creating User Defined Data in I/O_SLAVE Memory Category The APS can be set up to read data written from the external Modbus Master into memory that is user-defined. To set up the APS controller to allow the Modbus master to write data into new memory in the Slave Modbus Memory category, open up the Slave Write Register configuration window as defined in Table 3. The Slave Write Registers window as shown in Figure 35 will appear allowing you to define any number of input registers. Figure 35. Modbus Slave Write Registers Configuration Window 400011 Rev A (June 2007) Page 42 of 67 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.PDF Image | ADVANCED POWER SERVER (APS) USER’S MANUAL
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