TPU2000/2000R Modbus/Modbus Plus/ Modbus TCP/IP Automation Guide
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Notes Address Item Description
11052: IN3 Momentary Physical Input 3 Change Detect Between Host Scan
11053: IN2 Status Physical Input 2 Status
11054: IN2 Momentary Physical Input 2 Change Detect Between Host Scan
11055: IN1 Status Physical Input 1 Status
11056: IN1 Momentary Physical Input 1 Change Detect Between Host Scan
4X Register Read Capabilities
The TPU2000/2000R implementation of 4X registers allow for both status reads and in limited cases for control
register writes. Many host devices do not allow the access of data from discrete data types (such as 0X and 1X
discrete output and input function codes). The Modbus implementation within the TPU2000/2000R relay allows
for Modbus commands 03, 16 (10 hex) and 23 (17 hex) register commands. Real time relay status is available for
the following relay data types and functionality:
• Relay Status
• Diagnostic Status
• Unit Information
• CT and PT Information
• Physical Input Status
• Logical Input Status
• Physical Output Status
• Logical Output Status
• Load Metering Data
• Demand Metering Data
• Master Trip Functionality
• Fault Record Buffering (1- 32)
• Event Record Buffering (1- 128)
• Breaker Counter Operation Retrieval
• Force of Physical Outputs
• Breaker Control Functions over the network
• Reset of Counter, Event Buffer, Operational Buffer, Seal In and Target information.
Each function code and data type shall be explained in detail, within the following sections.
Modbus protocol allows a variety of information to be placed within the 4X register types. The interpretation of the
returned data is key to data received in the request. Modbus protocol is predicated upon register information
being returned. A register is 2 bytes, or 16 bits which translates into one word. Multiple words may be combined
to form a longer word which allows a larger read to obtained from the TPU2000/2000R. The TPU2000/2000R
supports the following data return types for 4X formats:
•
Unsigned - 16 bits - 2 bytes – Range 0 to + 65,535
• Signed - 16 bits – 2 bytes - Range –32,768 to 32,767
• Unsigned Long - 32 bits - 4 bytes - Range 0 to +4,294,967,295
• Signed Long - 32 bits - 4 bytes - Range -2,147,483,648 to +2,147,483,647
• ASCII - 16 bits – 2 bytes – 2 characters per register (Reference Appendix B)
The tables contained within this document reference the above definitions and give the cadence of bytes or words
as:
• MSB Most Significant Byte
• LSB Least Significant Byte
• MSW Most Significant Word
• LSW Least Significant Word
• Msb Most signficant bit
• Lsb Least significant bit
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