Toshiba GR200 Series Instruction Manual page 455

Process
Operation
Direct-operation mode (DIR)
3.2.2
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) .
DIR with enhanced security (DOes)
(i)
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
Process
(Server)
Operation
R esult
Figure 3.2-3 Direct control with enhanced security
DIR with normal security (DOns)
(ii)
A response (answer#2) from the target device is not sent to the SAS in DOns, as shown in
Figure 3.2-4.
Server
(SAS)
SBOw
Selection
Answer
Oper.
Answer
Figure 3.2-2 SBO with normal security
IE D
(Control function)
Oper.
Answer#1
Answer#2
- 434 -
IE D
(Control function) Target device
Command
Response
Command
Response
Target device
Command
R esponse
Device status changed
Command
termination
6F2S1915 (0.46)
GRZ200 (Soft 031 & 032)