ProSoft Technology 5205-104S-PDPS - Manual (Page 90)

4205/5205-TS-104S-PDPS ♦ ProLinx Standalone Diagnostics and Troubleshooting
IEC-60870-5-104 to PDPS Communication Module with Time Stamp
Page 90 of 128 ProSoft Technology, Inc.
July 12, 2007
Last Global Command
The value of the last global command code received from the master.
Bit Designation Significance
0 Reserved
1 Clear_Data With this command the ASCI output data is deleted in data
transfer buffer and is changed to next transfer data buffer
contents.
2 Unfreeze With 'Unfreeze' - freezing input data is cancelled.
3 Freeze The ASCI input data is fetched from next transfer buffer to data
transfer buffer and frozen. New input data is not fetched again
until the master sends the next 'Freeze' command.
4 Unsync The 'Unsync' command cancels the 'Sync' command.
5 Sync The ASCI output data transferred with a WRITE_READ_DATA
telegram is changed from data transfer buffer next state buffer.
The following transferred output data is kept in data transfer buffer
until the next 'Sync' command is given.
6,7 Reserved The Reserved designation specifies that these bits are reserved
for future function expansions.