TPU2000/2000R Modbus/Modbus Plus/ Modbus TCP/IP Automation Guide
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Whenever the relay is in the capture mode, the capture mode must be stopped to change setting information.
Therefore, the following must be performed before changing settings:
1. Register 63072 should be written with a value of “2” to fill registers with the present configuration data
within the TPU2000R. Registers 63073 and 63074 should contain the correct password to effectuate
the “REFRESH REGISTER” command.
2. The oscillographic accumulation must be stopped to effectuate re-parameterization of the unit. A value
of 0 must be written to Register 63076 to pause oscillographic monitoring.
3. The oscillographic data in the configuration block can be modified. To change the parameters, one
would write the changed parameters to the appropriate registers as defined in Table 5-53.
4. The host would then write a value of “1” (Start Oscillographic Accumulation) to Register 63076.
5. The host would then write a value of “1” (Transfer Settings) to register 63072 along with the
appropriate password (Registers 63073 and 63074). The data would then be transferred from
the
Modbus volatile register memory to the TPU2000R’s non-volatile configuration memory. This procedure
is shown in Figure 5-60 above.
Oscillographic Data Retrieval
The TPU2000R has two steps which must be accomplished for Oscillographic Data Retrieval. Step 1 is that the
Channel Data Parameters must be read from the TPU2000R. These parameters display the number of records in
the Oscillographics buffer, Trigger Information, sample time stamps and point scaling information. The data is
stored in a format in which the information is easily translated to a COMTRADE format.
The second step is the actual retrieval of the data point information used to construct the waveform. If one wishes
to retrieve oscillographics from a 3 Winding Unit, the mapping is shown in Table 5-55. If one wishes to retrieve
oscillographics from a 2 Winding Unit, the Modbus register map definition is given in Table YY.
Data Retrieval Theory of Operation (3 Winding Units)
There are two sets of write registers required to obtain the captured waveforms, 42690 and 42817/42818.
Register 42690 controls the data constant retrieval for interpreting the point information of the individual points
along the waveform curve. The registers in this define the parameters for the selected record. The method for
access is described in Figure 5-61.
EC
Command
Sequence Through
Modbus Command 16
Preset Multiple Holding Registers
STEP 1 -
Host sends following register contents
to retrieve the OSCILLOGRAPHIC constants
42690 = 1 ( Retrieve Record 1 Waveform)
EXAMPLE 1 -OSCILLOGRAPHIC CONFIGURATION DATA RETRIEVAL (STEP 1)
EC
EC
Command
Sequence Through
Modbus Command 03
Read Multiple Holding Registers
STEP 2 -
The host sends a read command to access
77 registers beginning from Address 42689 through
42809.
EC
The Relay Responds
over the network that
the data has been
accepted. If data has
not been accepted, an
exception response is
generated
The Relay Responds
over the network that
the data has been
accepted. If data has
not been accepted, an
exception response is
generated
Figure 5-61. Configuration Data Retrieval Example
Summary of Contents for TPU2000
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