GE B30 Communications Manual page 29

CHAPTER 2: MODBUS COMMUNICATION
32 Bit Binary — UR 7.4 supports this.
32 Bit Float — UR 7.4 supports this.
Single-file (.CFF) — Supported by devices that support IEEE 2013, so UR 7.4 supports this. One file with .CFF extension
instead of four separate .CFG, .INF, .HDR, and .DAT files.
Multi-file (.CFG) — When IEEE 1999 is selected, this option is selected automatically. When IEEE 2013 is selected,
choose between CFF or CFG format.
3. Click the Ok button to save and exit.
2.3.1.4 Reading oscillography files
Familiarity with the oscillography feature is required to understand the following description. See the Oscillography section
in chapter 5 of the Instruction Manual for details.
The "Oscillography Number of Triggers" register increments by one every time a new oscillography file is triggered
(captured) and cleared to zero when oscillography data is cleared. When a new trigger occurs, the associated
oscillography file is assigned a file identifier number equal to the incremented value of this register; the newest file number
is equal to the "Oscillography Number of Triggers" register. This register can be used to determine if any new data has been
captured by periodically reading it to see if the value has changed; if the number has increased then new data is available.
The "Oscillography Number of Records" register specifies the maximum number of files (and the number of cycles of data
per file) that can be stored in memory of the relay. The "Oscillography Available Records" register specifies the actual
number of files that are stored and still available to be read out of the relay.
Writing "Yes" (that is, the value 1) to the "Oscillography Clear Data" register clears oscillography data files, clears both the
"Oscillography Number of Triggers" and "Oscillography Available Records" registers to zero, and sets the "Oscillography
Last Cleared Date" to the present date and time.
For the IEEE 2013 standard, the following four time fields are added at the end of the configuration (.cfg) file:
• Time Code (time_code) and Local Code (local_code) — The Time Code is the time difference between local time and
UTC. The Local Code is the local time. Both are set to the same value as the Local Time Offset from UTC setting, and
when this setting is 0, the time used is UTC time and the time zone is at UTC.
• Time Quality Indictor Code (tmq_code) and Leap Second Indicator (leapsec) — The quality indicator indicates the
maximum time error between recorded time and the time synchronizing source. Examples: 0 means clock uses its
source, 4 means time good within 1 ms, and F means unreliable. The leap second indicates when a second has been
added or deleted, resulting in time stamps with a duplicate or missing second. Examples: 1 adds a leap second, 2
subtracts a leap second, and 3 means that time source cannot address leap seconds.
The fields are added in the file in two lines for time and time quality. An example is
-6h30, -6h30
A, 0
They display in the software.
UR FAMILY – COMMUNICATIONS GUIDE
Figure 2-3: Waveform image showing time fields
FILE TRANSFERS
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