Waveform Capture; Motor Start Data Logger; Event Recorder - GE 369 Communications Manual

MEMORY MAP
6.3

Event Recorder

6.4

Waveform Capture

6.5

Motor Start Data Logger

CG44
A read (function code 03 or 04) of registers 0100h (User Definable Register 0000) will return
the Phase A Current and register 0101h (User Definable Register 0001) will return Hottest
Stator RTD Temperature.
The 369 event recorder data starts at address 3000h. Address 3003h is a pointer to the
event of interest (1 representing the oldest event and 512 representing the latest event. To
retrieve event 1, write '1' to the Event Record Selector (3003h) and read the data from
3004h to 3022h. To retrieve event 2, write '2' to the Event Record Selector (3003h) and read
the data from 3004h to 3022h. All 512 events may be retrieved in this manner. The time
and date stamp of each event may be used to ensure that all events have been retrieved in
order without new events corrupting the sequence of events (event 3 should be more
recent than event 2, event 2 should be more recent than event 1, etc.).
The digital counter will be displayed when one of the digital inputs has been set up as a
digital counter. The digital counter can be cleared with the
DATA PRESET DIGITAL COUNTER
65535, it will automatically be reset by the 369 Relay relay to 0.
The 369 stores 16 cycles of A/D samples each time a trip occurs in a trace buffer. The Trace
Memory Trigger is set up in S1 Preferences and determines how many pre-trip and post-
trip cycles are stored. The trace buffer is time and date stamped and may be correlated to
a trip in the event record. 7 waveforms are captured this way when a trip occurs. These are
the 3 phase currents, ground current and 3 voltage waveforms. The last three captured
records are retained by the 369. This information is stored in volatile memory and will be
lost if power is cycled to the relay.
To access the captured waveforms, select the captured record by writing to the Trace
Memory Buffer Selector (address 30F5h), then select waveform of interest by writing its
trace memory channel (see following table) to the Trace Memory Channel Selector
(address 30F6h). Then read the trace memory data from address 3100h to 31FFh. The
values read are in actual amperes or volts.
TRACE MEMORY WAVEFORM
CHANNEL
0 Phase A current
1 Phase B current
2 Phase C current
3 Ground current
1. For an Open Delta VT connection channel 4 contains Vab data and channel 6 contains Vcb data.
When a motor start status condition is detected by the 369 relay, the
is triggered and begins to sample and record the following parameters at a rate
LOGGER
of 1 sample every 200ms:
CGCOMMUNICATIONS GUIDE
S1 369 SETUP
setpoint. When the digital counter has exceeded
TRACE MEMORY
CHANNEL
4
5
6
369 MOTOR MANAGEMENT RELAY – COMMUNICATIONS GUIDE
CLEAR/PRESET
WAVEFORM
1
Phase A voltage
Phase B voltage
1
Phase C voltage
MOTOR START DATA