Retrieving Oscilography; Time Synchronization; B.6.7 Retrieving Oscilography - GE F650 Instruction Manual

APPENDIX B
In case of not using the quickest download method by TFTP, ModBus can be used for downloading oscillography, in the
same way that events (snap-shots). First of all, open file with writing message in 0xfe40, where desired file to open is
indicated, it could be:
OSC01.DAT (COMTRADE data file in binary)
OSC02.CFG (COMTRADE configuration file)
OSC01.HDR (COMTRADE header file)
OSC02.DAT
OSC02.HDR
...
For reading the oscillography in several strings, several reading requests must be sent to 0xff40 address . For reading the
previous message a reading petition must be sent to 0xff42 address. The maximum number of bytes to be read in each part
is 244.
Time synchronization consists of setting of relay date and time.
It may be supposed that is similar to a usual settings group writing but it has particularities:
- It is a data type very particular because it is made up of other simples.
- Once the data is changed, varies with time, it is a changing setting that can be read.
- It shares the time change with the IRIGB (this has more priority) and with a possible modification from MMI or another
protocols.
- In case of the relay gets disconnected from its auxiliary power supply, during some days, the time will remain in a
chip, feed by a capacitor (it does not need maintenance).
- And last, there are synchronism between the real time chip and the microprocessor time.
Time synchronization is made by a reading message over 0xfff0 address, either with the address of a single relay, if a
writing confirmation is desired, or in broadcast, to synchronize several relays simultaneously.
Date/time format is unsigned double (8 bytes) in MOTOROLA format, which indicates the passed milliseconds from 1
January 2000.
Reading example:
[0xFE 0x03 0xFF 0xF0 0x00 0x04 0x60 0x21] ---------> RELAY
PC <---------- [0xFE 0x03 0x08 0x00 0x00 0x00 0x17 0x05 0xFA 0xD5 0xBA 0x2D 0x1D]
Synchronism example:
[0xFE 0x10 0xFF 0xF0 0x00 0x04 0x08 0x00 0x00 0x00 0x17 0x9B 0x53 0x3F 0x60 0xA4 0x2B] ---------> RELAY
PC <---------- [0xFE 0x10 0xFF 0xF0 0x00 0x04 0xE5 0xE2]
GEK-106310AB
B.6 EVENTS STATUS REQUEST(ALARMS)
F650 Digital Bay Controller

B.6.7 RETRIEVING OSCILOGRAPHY

B.6.8 TIME SYNCHRONIZATION
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