Eaton PT 10, Инструкция по эксплуатации

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29 PT UNIT USER MANUAL
APRIL 2023 www.eaton.com.cn
Table A3. Real Time Data
Register Number. Register Addresses (HEX) Objects
FP Data
Factor IEEE Float Fixed Point (FP) IEEE Float Fixed Point (FP) Descriptions Units
404977 406513 1370 1970 Test Trip count 1
404979 406515 1372 1972 Open by Comm count 1
404981 406517 1374 1974 Manual Open count 1
404983 406519 1376 1976 Time of Last Operation (Year, Month, Day, Hour, Minute, Second) 1
404995 406531 1382 1982 Max Device Temperature ºC 1
404997 406533 1384 1984 Time of Max Device Temperature (Year, Month, Day, Hour, Minute, Second) 1
405009 406545 1390 1990 Running Time: Minute 1
405011 406547 1392 1992 Running Time: Hour 1
405013 406549 1394 1994 Running Time: Day 1
405015 406551 1396 1996 Breaker health life point 1
Energy objects can be obtained in two-register, fixed point
data format and four-register encoded format. Floating point
data format is not supported.
The two-register format is presented in units of kilowatt-
hours. The four registers encoded energy object occupies
Register 3 through Register 0. Register 3 is the high order
register and Register 0 is the low order register. Register 3
high byte contains value corresponding to engineering units
(power of 10 signed exponent). Register 3 low byte contains
a mantissa multiplier value (power of 2 exponent). Register 2
through Register 0 contains a 48-bit energy mantissa in units
of watt-hours. The data format of four registers is shown in
Figure A1.
Figure A1. Four-Register Energy Data Format.
A.3.3 Setpoints Register
The trip unit's setpoints are organized into groups. Each
group can be considered a binary array of information which
can be obtained through Modbus register access. Register
403001 is a R/W register used to select the particular group.
The high byte contains the requested group number, while
the low byte must contain 255 (FFW). The setpoints register
can be read using function code 03 or 04. Register 403001
can be written using function code 06 or 16. For trip units
which support write setpoint capabilities, the setpoints
should be written one by one using function code 06. Before
reading or writing the setpoints, register 403001 should be
written to choose corresponding group.
Group 0 is the system group, listed in Table A4. Group 1 and
5 are the protection groups, listed in Table A5.
Appendix A - Modbus Communication Port Setting