Control Access; Table 19 Command And Status For Control Access - ABB LVS Digital Manual

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8.2.7 Control Access

Control Access (CA) is a mechanism within LVS Digital to define and determine which user in-
terface has control rights to operate the UMC modules. These interfaces are defined below in
command handling. Control Access rights can be given, for example, by a specific command
sent to switch operation rights from push-button (hardwired to UMC) to any other interface
connected via the Digital Gateway (e.g. MView or DCS).
8.2.7.1 Command Handling
The control access command defines the control rights of defined interfaces for an
UMC.
CA Interface
DCS only
MView (Web
interface)
Hardware Lo-
cal
(Hardware In-
puts)

Table 19 Command and Status for Control Access

Notes:
At any time, any control station can obtain the control access by sending a control access
command to UMC. On MView (or web interface) the user must have the appropriate user right
to do so.
Hardware-Local must be activated by the setting the input on the UMC.
CA Remote is set if the command 'Remote Control' command is sent to the UMC from the
DCS. Only then it is possible to send switching commands from the DCS.
1 TG C90 80 04
Remote – UMC switches to Remote operation mode and can be operated via
Fieldbus from process control system (DCS / PLC)
Bus-Local – UMC switches to the Bus-Local mode and operation is
ble:
• via MView (local operation panel in switchboard) or
• via web interface (like MView).
Hardware-Local – UMC switches to the Hardware-Local mode and operation
is possible only through digital inputs on UMC Hardware. Hardware-Local
must be activated by the setting the input on the UMC.
Command
Auto Mode
(CA Remote)
1
0
X
Command
Bus Local
(CA BusLocal)
0
1
X
D EFAULT DATA MAP
possi-
Status Bit
Auto Mode
(Bus Control)
1
1
0
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