55
11 Modbus register map
PXR TRIP UNITS FOR POWER DEFENSE MOLDED CASE CIRCUIT BREAKERS MN012007EN March 2019 www.eaton.com
Register number
Register
address (HEX) Objects Trip Unit
IEEE
float
Fixed
point (FP)
IEEE
float
Fixed
point (FP) Descriptions Units
Fp scale
factor
PXR
20/20D
PXR
25
PXR
25MP
405063 406599 13C6 19C6 Item harmonics[18] % 100 YES
405065 406601 13C8 19C8 Item harmonics[19] % 100 YES
405067 406603 13CA 19CA Item harmonics[20] % 100 YES
405069 406605 13CC 19CC Item harmonics[21] % 100 YES
405071 406607 13CE 19CE Item harmonics[22] % 100 YES
405073 406609 13D0 19D0 Item harmonics[23] % 100 YES
405075 406611 13D2 19D2 Item harmonics[24] % 100 YES
405077 406613 13D4 19D4 Item harmonics[25] % 100 YES
405079 406615 13D6 19D6 Item harmonics[26] % 100 YES
405081 406617 13D8 19D8 Item harmonics[27] % 100 YES
405083 406619 13DA 19DA Item harmonics[28] % 100 YES
405085 406621 13DC 19DC Item harmonics[29] % 100 YES
405087 406623 13DE 19DE Item harmonics[30] % 100 YES
405089 406625 13E0 19E0 Item harmonics[31] % 100 YES
405091 406627 13E2 19E2 Item harmonics[32] % 100 YES
405093 406629 13E4 19E4 Item harmonics[33] % 100 YES
405095 406631 13E6 19E6 Item harmonics[34] % 100 YES
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 3 through register 0 contains a 48-bit energy
mantissa in units of watthours. The data format of four registers is shown.
Floating point format and Note: Format can be changed. Please see 11.3.5 Block of
registers
11.3.3 Set points registers
The trip unit’s set points are organized into groups. Each group can be considered as a
binary array of information which can be obtained through Modbus register access. Register
403001 is an R/W register used to select the particular group (Default selected group 0).
The high byte contains the requested group number, while the low byte must contain
255(0FF16). The set points 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 set
points capabilities, the set points group 0/1/2 should be written one by one using function
code 06, the set points group four should be written the whole group using function code
16. Before reading or writing the set points, register 403001 should be written to choose
corresponding group. Before writing any set points, you must input correct password, and
write the set points within ten seconds after password checks ok.
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