GE C70, Instruction Manual

Page: 188 / 708

5-64 C70 Capacitor Bank Protection and Control System GE Multilin
5.2 PRODUCT SETUP 5 SETTINGS
5
5.2.5 MODBUS USER MAP
PATH: SETTINGS

PRODUCT SETUP

MODBUS USER MAP
The Modbus user map provides read-only access for up to 256 registers. To obtain a memory map value, enter the desired
address in the
ADDRESS
line (converted from hex to decimal format). The corresponding value displays in the
VALUE
line. A
value of “0” in subsequent register
ADDRESS
lines automatically returns values for the previous
ADDRESS
lines incremented
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.
5.2.6 REAL TIME CLOCK
a) MAIN MENU
PATH: SETTINGS

PRODUCT SETUP

REAL TIME CLOCK
The relay contains a real time clock (RTC) to create timestamps 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-backed
clock, which has the same accuracy as an electronic watch, approximately ±1 minute per month (~23 ppm). Once the RTC
is synchronized with the Precision Time Protocol (PTP), IRIG-B, or SNTP, its accuracy approaches that of the synchroniz-
ing time delivered to the relay. While the RTC is not synchronized via PTP or IRIG-B, or the relay determines than it has an
offset possibly greater than 10 µs from the international time standard, the CLOCK UNSYNCHRONIZED FlexLogic oper-
and is activated.
The
SYNCHRONIZING SOURCE
setting displays when the relay includes the IEEE 1588 software option. The setting config-
ures the priority sequence of the time synchronization source, to determine which of the available external time sources to
use for time synchronization. A setting of None causes the RTC and the synchrophasor clock to free-run until the clock is
Virtual Input 1 1
Virtual Input 2 2
...
Virtual Input 64
64

MODBUS USER MAP

ADDRESS 1: 0
VALUE: 0
Range: 0 to 65535 in steps of 1
MESSAGE
ADDRESS 2: 0
VALUE: 0
Range: 0 to 65535 in steps of 1
MESSAGE
ADDRESS 3: 0
VALUE: 0
Range: 0 to 65535 in steps of 1
↓
MESSAGE
ADDRESS 256: 0
VALUE: 0
Range: 0 to 65535 in steps of 1

REAL TIME

CLOCK
SYNCRONIZING SOURCE:
None
Range: None, PP/IRIG-B/PTP/SNTP, IRIG-B/PP/PTP/
SNTP, PP/PTP/IRIG-B/SNTP
MESSAGE
REAL TIME CLOCK
EVENTS: Disabled
Range:Enabled, Disabled
MESSAGE
IRIG-B SIGNAL TYPE:
None
Range:None, DC Shift, Amplitude Modulated
MESSAGE

PRECISION TIME

PROTOCOL (1588)
See below
MESSAGE

SNTP PROTOCOL

See below
MESSAGE

LOCAL TIME

See below
DESCRIPTION VALUE