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Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Technical Reference: ModBus Translator Module Test Modes Invalid address settings and the baud rate selector shall be used to place the system into various modes. In addition to normal operation, test modes will be made available for the Golden System board test operator and Unit-Under Test (UUT) functions. The table below shows mode selections and corresponding address settings: Table 11 - Mode Selection (Address) Mode Address Setting Normal Unit Under Test Golden System Golden System 1 – 247 0 and 248-254 255 The Baud Rate selector switch provided on the ModBus Translator Board will determine the RS-485 baud rate. A Golden System (address set to 255), when powered up will: 1. Delay for 2 seconds in order for UUT to power up. The lower LED shall be ON during this process. 2. Begin blinking lower LED 250 msec ON, then 250 msec OFF, repeatedly, to indicate test in progress. 3. Test RS-232 communications by executing a command to the UUT. 4. Send an RS-232 command to initiate execution of a Loopback Command on the UUT. 5. Verify RS-485 command was received from UUT address (245d). 6. Respond to the UUT’s Loopback Command (08h). 7. Verify the RS-232 response contains the correct data from the Loopback Command. 8. Execute steps 4 through 7 for nine (9) more iterations to verify operation. 9. Report that the test was successful by leaving the lower LED turned ON. When a failure has occurred, the lower LED shall be turned OFF for 2 seconds. This OFF period will be followed by a continued blink of the lower LED to indicate the Test Code below followed by a 2 second OFF break. The blink rate shall be 50 msec ON followed by 250 msec OFF. The table below shows reported test codes: Table 12 – Reported Test Codes Test Successfully Complete RS-232 Communication Failure RS-485 Communication Failure 410040-001 Rev A (February 2003) This information is proprietary to Capstone Turbine Corporation. Neither this document nor the information contained herein shall be copied, disclosed to others, or used for any purposes other than the specific purpose for which this document was delivered. Capstone reserves the right to change or modify without notice, the design, the product specifications, and/or the contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction. Test Code Description 1 2 3 Page 32 of 35PDF Image | Technical Reference Modbus Translator Module
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