Toshiba GR200 Series - 3.2.2 Direct-operation mode (DIR); (i) DIR with enhanced security (DOes); (ii) DIR with normal security (DOns)

6F2S1914 (0.49)
GRL200 (Soft 033 & 037)
- 556 -
Server
(SAS)
IED
(Control function)
Target device
Selection
Operation
SBOw
Answer
Oper.
Answer
Command
Response
Command
Response
Process
Figure 3.2-2 SBO with normal security
3.2.2 Direct-operation mode (DIR)
In the DIR mode, a target device is controlled without the reception of the select command. An
enhanced security mode (DOes) is also provided when the user wishes to control a device with
additional security rather than the normal level of security experienced with mode (DOns) .
(i) DIR with enhanced security (DOes)
Figure 3.2-3 illustrates the server sending the Oper request to the IED; the server receives a
response, (answer#1) from the IED. The result is notified when the operation of the target
device is complete. The result includes status information; it informs whether the target device
has operated normally or not. Note that the control start of the target device is initiated
regardless of the state of the target device.
SAS
(Server)
IED
(Control function)
Target device
Operation
Result
Oper.
Answer#1
Answer#2
Command
Response
Process
Command
termination
Device status changed
Figure 3.2-3 Direct control with enhanced security
(ii) DIR with normal security (DOns)
A response (answer#2) from the target device is not sent to the SAS in DOns, as shown in
Figure 3.2-4.