Rockwell Automation 865 Differential Protection Relay - Manual (Page 125)

Control Functions 6-7
865-UM001A-EN-P – July 2009
Settings for Read-only Objects
Each read-only object has the following settings:
Table 6.9 – Settings for Read-only Objects
Setting Value Description
DI for ‘obj open’ Open information
DI for ‘obj close’
None, any digital input, virtual
input or virtual output
Close information
Object timeout 0.02 … 600 s Timeout for state changes
If changing states takes longer than the time defined by “Object
timeout” setting, object fails and “Object failure” matrix signal is set.
Also undefined-event is generated.
Controlling with DI
Objects can be controlled with digital input, virtual input or virtual
output. There are four settings for each controllable object:
Table 6.10 – Controlling with DI
Setting Active
DI for remote open control
DI for remote close control
In remote state
DI for local open control
DI for local close control
In local state
If the device is in local control state, the remote control inputs are
ignored and vice versa. Object is controlled when a rising edge is
detected from the selected input. Length of digital input pulse should
be at least 60 ms.
Local/Remote Selection
In Local mode, the output relays can be controlled via a local HMI,
but they cannot be controlled via a remote serial communication
interface.
In Remote mode, the output relays cannot be controlled via a local
HMI, but they can be controlled via a remote serial communication
interface.
The selection of the Local/Remote mode is done by using a local
HMI, or via one selectable digital input. The digital input is
normally used to change a whole station to a local or remote mode.
The selection of the L/R digital input is done in the “Objects” menu
of the SetPointPS software.
NOTE:
A password is not required for a remote control operation.