ProSoft Technology 5105-103M-PDPS - Manual (Page 68)

Diagnostics and Troubleshooting 5105-103M-PDPS ♦ ProLinx Gateway
User Manual IEC 60870-5-103 Master to PROFIBUS Slave Gateway
Page 68 of 144 ProSoft Technology, Inc.
November 24, 2010
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.