ABB LVS Digital, Руководство пользователя

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DATA MAPPING DEFAULT DATA MAP
1TGC908004 63
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 M10x
modules. These interfaces are defined below
in command handling. Control Access rights can be given, for example, by a specific com-
mand sent to switch operation rights from push-button (hardwired to M10x) to any other in-
terface connected via the Digital Gateway (e.g. MView
or DCS).
9.2.9.1. Command Handling
The control access command defines the control rights of defined interfaces for an
M10x.
Remote – M10x switches to Remote operation mode and can be operated via
Fieldbus from process control system (DCS / PLC)
Bus-Local – M10x switches to the Bus-Local mode and operation is possi-
ble:
– via MView (local operation panel in switchboard) or
– via web interface (like MView).
Hardware-Local – M10x switches to the Hardware-Local mode and operation
is possible only through digital inputs on M10x Hardware. Hardware-Local
must be activated by the setting the input on the M10xl
Table 35 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 M10x. 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 M10x.
CA Remote is set if the command ‘Remote Control’ command is sent to the M10x from the
DCS. Only then it is possible to send switching commands from the DCS.
CA BusLocal will be active if Auto Mode is not set and the Bus Local command bit goes from 0
to 1.
Command Command Status Bit
CA Interface Auto Mode
(CA Remote)
Bus Local
(CA BusLocal)
Auto Mode
(Bus Control)
DCS only 1 0 1
MView (Web
interface) 0 1 1
Hardware Lo-
cal
(Hardware In-
puts)
X X 0