5-94 C60 BREAKER PROTECTION SYSTEM – INSTRUCTION MANUALPRODUCT SETUP CHAPTER 5: SETTINGS55.3.5 Modbus user mapSETTINGS PRODUCT SETUP MODBUS USER MAPThe Modbus user map provides read-only access for up to 256 registers. To obtain a memory map value, enter the addressin the ADDRESS line (converted from hex to decimal format). The corresponding value (if programmed) displays in the VALUEline. A value of “0” in subsequent register ADDRESS lines automatically returns values for the previous ADDRESS linesincremented by 1. An address value of “0” in the initial register means “none” and values of “0” display for all registers.Different ADDRESS values can be entered as required in any of the register positions.The UR Family Communications Guide outlines the Modbus memory map. The map is also viewable in a web browser;enter the IP address of the C60 in a web browser and click the option.5.3.6 Real time clock5.3.6.1 MenuSETTINGS PRODUCT SETUP REAL TIME CLOCKThe relay contains a real time clock (RTC) to create time stamps for communications protocols as well as for historical data,such as event records and oscillography. When the relay restarts, the RTC initializes from an onboard battery-backedclock, which has the same accuracy as an electronic watch, approximately ±1 minute per month (~23 ppm). Once the RTCis synchronized with the Precision Time Protocol (PTP), IRIG-B, or SNTP, its accuracy approaches that of the synchronizingtime delivered to the relay. While the RTC is not synchronized via PTP or IRIG-B, or the relay determines that it has an offsetpossibly greater than 10 μs from the international time standard, the CLOCK UNSYNCHRONIZED FlexLogic operand isactivated.The SYNCHRONIZING SOURCE setting displays when the relay includes the IEEE 1588 software option. The setting configuresthe priority sequence of the time synchronization source, to determine which of the available external time sources to usefor time synchronization. A setting of None causes the RTC and the synchrophasor clock to free-run, and the clock can bechanged from the front panel or from communications protocols. A setting of PP/IRIG-B/PTP/Other, IRIG-B/PP/PTP/Other, orPP/PTP/IRIG-B/Other causes the relay to track the first source named that is enabled and operational, or free-run if none of... ...Virtual Input 64 64 MODBUS USER MAP ADDRESS 1: 0VALUE: 0Range: 0 to 65535 in steps of 1 ADDRESS 256: 0VALUE: 0Range: 0 to 65535 in steps of 1 REAL TIME CLOCK SYNCRONIZING SOURCE:NoneRange: None, PP/IRIG-B/PTP/Other, IRIG-B/PP/PTP/Other, PP/PTP/IRIG-B/Other REAL TIME CLOCKEVENTS: DisabledRange: Enabled, Disabled IRIG-B SIGNAL TYPE:NoneRange: None, DC Shift, Amplitude Modulated PRECISION TIME PROTOCOL (1588)See below SNTP PROTOCOLSee below LOCAL TIMESee belowDescription Value
