Table 5-55. Oscillographic Data Format Retrieval Block - ABB TPU2000 Technical Manual

Register 42817 and 42818 control the method to obtain the individual points to construct the curve.
Each waveform consists of 32 points. The TPU2000R stores the waveform and transfers the data to the host in
quarter cycle blocks. Thus, if 8 cycles are stored for a waveform Record, 32 blocks of data must be retrieved by
the host to display the selected waveform record. Waveform data is to be read eight points per channel with eight
channels per block.
The steps required to read the data are as such:
Write the record number and quarter cycle block to access (Register 42818 = 1 for read first Quarter Cycle
Block of Data). The TPU2000R shall reset the control register to 0.
Read the block of point data.
Write the Record Number and quarter cycle block to access (Register 42818 = 2 for read next Quarter Cycle
Block of Data). The TPU2000R shall reset the control register to 0.
Read the Block of point data.
If Register 42820 is not equal to 0, repeat the previous two steps.
The process is illustrated pictorially in Figure 5-62.
Figure 5-62. Memory Map Philosophy for Oscillographics Waveform Retrieval

Table 5-55. Oscillographic Data Format Retrieval Block

Register Item
Address
3 Winding
CHANNEL DATA
42689 READ DATA – Number of Records Stored
42690 WRITE DATA – Record Desired to
Retrieve
42691 READ DATA –Trigger Flag Word 1
RESERVED
42692 READ DATA – Trigger Flag Word 2
RESERVED
42693 READ DATA – Trigger Flag Word 3
Bit 0 = Master Trip (lsb)
Bit 1 = Breaker Open
Bit 2 = WCI
Bit 3 = Reserved
TPU2000/2000R Modbus/Modbus Plus Automation Guide
TPU REGISTER 4X OSCILLOGRAPHICS MAP MEMORY
RECORD 1
1st Quarter Cycle
2nd Quarter Cycle
3rd Quarter Cycle
Record Number
Desired
RESERVED
Nth Quarter Cycle
Quarter Cycles In Record
E C
RECORD N
1st Quarter Cycle
2nd Quarter Cycle
3rd Quarter Cycle
Nth Quarter Cycle
Viewable
Via Modbus/Modbus Plus
Not Viewable
By Operator
Write Record Number Required
42817
42818
Control
Data Register
Write Quarter Cycle Block Desired
42819
42820
42821
..
Oscillographic
Configuration
Settings
Read Quarter Cycle Data
42930
Description
Unsigned Integer (16 Bits)
Amount of Data Records in Buffer (Value = 0- 8)
Unsigned Integer (16 Bits)
(Value = 0 to 8)
Unsigned Integer (16 Bits)
RESERVED
Unsigned Integer (16 Bits)
RESERVED
Unsigned Integer (16 Bits)
Start Capture on Master Trip State
Start Capture on Breaker Open
Start Capture on Waveform Capture Initiate
Reserved
163