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Important Note Concerning the IQ 100 Series Modbus Map
In depicting Modbus Registers (Addresses), the IQ 100 Series meter's Modbus map uses Holding
Registers only.
Hex Representation
The representation shown in the table below is used by developers of Modbus drivers and libraries, SEL
2020/2030 programmers and Firmware Developers. The meter's Modbus map also uses this representa-
tion.
Hex
Description
0008 – 000F Meter Serial Number
Decimal Representation
The meter's Modbus map defines Holding Registers as (4X) registers. Many popular SCADA and HMI
packages and their Modbus drivers have user interfaces that require users to enter these Registers start-
ing at 40001. So instead of entering two separate values, one for register type and one for the actual
register, they have been combined into one number.
The meter's Modbus map uses a shorthand version to depict the decimal fields -i.e., not all of the digits
required for entry into the SCADA package UI are shown.
For example:
You need to display the meter's serial number in your SCADA application. The meter's Modbus map
shows the following information for meter serial number:
Decimal
Description
9 – 16
Meter Serial Number
In order to retrieve the meter's serial number, enter 40009 into the SCADA UI as the starting register,
and 8 as the number of registers.
•
In order to work with SCADA and Driver packages that use the 40001 to 49999 method for request-
ing holding registers, take 40000 and add the value of the register (Address) in the decimal column of
the Modbus Map. Then enter the number (e.g., 4009) into the UI as the starting register.
•
For SCADA and Driver packages that use the 400001 to 465536 method for requesting holding reg-
isters take 400000 and add the value of the register (Address) in the decimal column of the Modbus
Map. Then enter the number (e.g., 400009) into the UI as the starting register. The drivers for these
packages strip off the leading four and subtract 1 from the remaining value. This final value is used
as the starting register or register to be included when building the actual modbus message.
Modbus Register Map (MM-1 to MM-16)
The IQ 100 Series Modbus Register Map begins on the following page.
User and Installation Manual IM02601003E - July 2010 www.eaton.com
IQ 100 Series ((130/140/150) Meter
App B: Modbus Map
77
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