ProSoft Technology 5201-MNET-101S - Manual (Page 91)

IEC-101 Slave ♦ ProLinx Communication Gateway Reference
IEC 60870-5-101 v3 Slave (Firmware version 3.xx) Protocol Manual
ProSoft Technology, Inc. Page 91 of 159
August 6, 2010
Control Data Transfer
The control communication typically occurs when the Master sends a command
request to update the gateway’s command points.
The following illustration shows a typical command communication between the
Master and gateway during unbalanced operation.
Some of the command points may be configured to be selected before executed.
The following illustration shows a typical command communication between the
Master and gateway operation with a SELECT operation.