B: Modbus Map
Doc# E145701 MM-16
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Description
1
Format
Range
6
Units or Resolution
Comments
#
Reg
Modbus Address
Hex
Decimal
9C55 - 9C56
40022 - 40023
W-hours, Positive
UINT32
0 to 99999999
Wh per energy format
* 5 to 8 digits
2
9C57 - 9C58
40024 - 40025
W-hours, Negative
UINT32
0 to 99999999
Wh per energy format
* decimal point implied, per energy format
2
9C59 - 9C5A
40026 - 40027
VAR-hours, Positive
UINT32
0 to 99999999
VARh per energy format
2
9C5B - 9C5C
40028 - 40029
VAR-hours, Negative
UINT32
0 to 99999999
VARh per energy format
2
9C5D - 9C5E
40030 - 40031
VA-hours
UINT32
0 to 99999999
VAh per energy format
* see note 10
2
9C5F - 9C5F
40032 - 40032
Neutral Current
UINT16
0 to 4095
amps
see Amps A/B/C above
1
9C60 - 9CA2
40033 - 40099
Reserved - do not use.
67
9CA3 - 9CA3
40100 - 40100
Reset Energy Accumulators
UINT16
password
5
write-only register; always reads as 0
1
Block Size:
100
Notes
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
If the password is incorrect, a valid response is returned but the command is not executed. Use 5555 for the password if passwords are disabled in the programmable settings.
Data Formats
If any register in the programmable settings section is set to a value other than the acceptable value then the meter will stay in LIMP mode. Please read the comments section or the range for each
register in the programmable settings section for acceptable settings.
Writing this register causes data to be saved permanently in EEPROM. If there is an error while saving, a slave device failure exception is returned and programmable settings mode automatically
terminates via reset.
32-bit IEEE floating point number spanning 2 registers. The lower-addressed register is the high order half (i.e., contains the exponent
All registers not explicitly listed in the table read as 0. Writes to these registers will be accepted but won't actually change the register (since it doesn't exist
Meter Data Section items read as 0 until first readings are available or if the meter is not in operating mode. Writes to these registers will be accepted but won't actually change the registe
Register valid only in programmable settings update mode. In other modes these registers read as 0 and return an illegal data address exception if a write is attempte
Not applicable to Shark 50.
M denotes a 1,000,000 multiplier.
Meter command registers always read as 0. They may be written only when the meter is in a suitable mode. The registers return an illegal data address exception if a write is attempted in an incorrect
mode.
SINT16 / UINT16
16-bit signed / unsigned integer.
End of Map
Not applicable to Shark 50.
ASCII
ASCII characters packed 2 per register in high, low order and without any termination characters. For example, "Shark50" would be 4 registers containing 0x5368, 0x6172, 0x6B35,
0x3020.
Not applicable to Shark 50.
Energy registers should be reset after a format change.
Reset commands make no sense if the meter state is LIMP. An illegal function exception will be returned.
SINT32 / UINT32
FLOAT
32-bit signed / unsigned integer spanning 2 registers. The lower-addressed register is the high order half
Not applicable to Shark 50.
All 3 voltage angles are measured for Wye and Delta hookups. For 2.5 Element, Vac is measured and Vab & Vbc are calculated. If a voltage phase is missing, the two voltage angles in which it
participates are set to zero. A and C phase current angles are measured for all hookups. B phase current angle is measured for Wye and is zero for other hookups. If a voltage phase is missing, its
current angle is zero.
Not applicable to Shark 50.
* resolution of digit before decimal point =
units, kilo, or mega, per energy format
