18
3 Modbus Register Map
3.1 Modbus Setup Registers
Address Point
ID
Description
Options/Range Units
Type
R/W
Notes
Assignable Modbus Registers
0-119
+0
Register 0 contents
0-65535
UINT16
R/W
+1
Register 1 contents
0-65535
UINT16
R/W
...
+119
Register 119 contents
0-65535
UINT16
R/W
Assignable Registers Map
120-239
+0
Mapped register 0 address
0-65535
UINT16
R/W
+1
Mapped register 1 address
0-65535
UINT16
R/W
+119
Mapped register 119 address
0-65535
UINT16
R/W
Modbus Conversion Scales
240
Low raw scale
0
UINT16
R
241
High raw scale
9999
UINT16
R
Device Data Scales
242
Voltage scale, secondary volts
60-828 1V
UINT16
R/W
Default
144V
243
Current scale, secondary amps
10-100
×
0.1A
UINT16 R/W
Default 2
×
CT secondary
244-245
Reserved
0
UINT16
R
32-bit Register Type
246
Type of 32-bit registers
Bits 0-1 - analog values:
0 = 32-bit integer
1 = 32-bit floating point
Bits 2-3 - binary counters:
0 = 32-bit integer
1 = 32-bit floating point
Bit 4-5 - energy counters:
0 = 32-bit integer
1 = 32-bit floating point
UINT16
R/W
Default
0
Provided
by
Northeast
Power
Systems,
Inc.
www.nepsi.com
