Doc# E166703 B-4
B: Modbus Map Overview
Electro Industries/GaugeTech
The Leader In Power Monitoring and Smart Grid Solutions
Electro Industries/GaugeTech
The Leader In Power Monitoring and Smart Grid Solutions
Electro Industries/GaugeTech
The Leader In Power Monitoring and Smart Grid Solutions
B.5.2: Decimal Representation
The MP200 unit's Modbus map defines Holding Registers as (4X) registers. Many pop-
ular SCADA and HMI packages and their Modbus drivers have user interfaces that
require users to enter these Registers starting 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 MP200 unit'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 MP200 unit's serial number in your SCADA application. The
MP200 unit's Modbus map shows the following information for MP200 unit serial
number:
In order to retrieve the MP200 unit’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 requesting holding registers, take 40000 and add the value of the regis-
ter (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 registers 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.
Decimal Description
9 - 16 MP200 Unit Serial
Number
To Next Page
Loading...
Need help?
General
