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.
FloatHng poHnt format and Notet:
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.
