Table 5-32. Fault Record Data Assignment - ABB TPU2000 Technical Manual

TPU2000/2000R Modbus/Modbus Plus/ Modbus TCP/IP Automation Guide

Table 5-32. Fault Record Data Assignment

Description
Differential Fault Records
Through Fault Records
Harmonic Restraint Records
Differential Fault Records
Through Fault Records
Differential Fault Records
If the number of faults exceed 32, then the buffer overwrites the oldest record contained within its internal stack.
Access and control can be accomplished over Modbus in one of two methods.
If no data accumulated within the fault record, values of 0 shall be returned in the buffer. A new fault record entry
is indicated via Bit 6 of Register 40129 being set to a 1. Reference Table 5-9 of this document for a more detailed
explanation of the registers bit map.
The Fault Record number can be a number from 1 to 999. ONLY THE PREVIOUS 32 RECORDS ARE KEPT IN
THE FAULT RECORD BUFFER. Fault Records are sequentially numbered from 1 to 999. If the fault number is
presently at 999, and an additional fault is recorded, the fault number shall rollover to 1. The Record number and
fault buffer cannot be cleared and reset through a keypad or unit reset procedure or a reset via the network as
explained in Section 3 as a note.
METHOD 1:
The host writes a Modbus 23 Command (Modbus 4X Register Read/Write) in which a control code (1, 2,
or 3) is written to The Fault Control Register Address as defined in Table 1 and the buffer is filled with
fault data from the Fault Buffer Start until the Buffer End address. A command of 1 = Points to the First
Record in the Fault Table. A command of 2 Points to the next fault in the fault table. A command of 3
points to the last unreported fault in the fault table. Figure 5-39 graphically illustrates the write/read
process for access of fault or operation records.
METHOD 2:
The host writes a Modbus Command 16 (Modbus 4X Register Write Command) in which a control code
(1, 2, or 3) is written to the Fault Control Register Address as defined in Table 5-32 and the buffer is filled
with fault data in the addresses defined for the Fault Buffer (reference Table 5-32). Within 10 seconds
after the 16 command is issued, the host issues a Modbus 03 command (Modbus 4X Register Read
command) in which the fault data is retrieved from the Fault Buffer as defined for the retrieved fault.
Control Buffer
Register Start
Address Address
41665 41666
41793 41794
41921 41922
42305 42306
42433 42434
42561 42562
Buffer Buffer
End Register
Address Size
41745 80
41830 37
42009 88
42352 47
42466 33
42601 40
Notes
2 Winding Records Only
2 Winding Records Only
2 Winding Records Only
3 Winding Records Only
3 Winding Records Only
3 Winding Records Only
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