Control Access; Table 34 Command And Status For Control Access - ABB M101 Manual

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9.2.9. Control Access

Control Access (CA) is a mechanism within MNS Digital to define and determine which user
interface has control rights to operate the M10x-M modules. These interfaces are defined be-
low 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-M) to any other
interface connected via the MNS 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-M.
CA Interface
DCS only
MView (Web
interface)
Hardware Lo-
cal
(Hardware In-
puts)

Table 34 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-M. 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-M.
CA Remote is set if the command 'Remote Control' command is sent to the M10x-M from the
DCS. Only then it is possible to send switching commands from the DCS.
58
Remote – M10x-M switches to Remote operation mode and can be operated
via Fieldbus from process control system (DCS / PLC)
Bus-Local – M10x-M switches to the Bus-Local mode and operation is
possible:
– via MView (local operation panel in switchboard) or
– via web interface (similar to MView).
Hardware-Local – M10x-M switches to the Hardware-Local mode and opera-
tion is possible only through digital inputs on M10x-M Hardware. Hardware-
Local must be activated by the setting the input on the M10x-Ml
Command
Auto Mode
(CA Remote)
1
0
X
Command
Bus Local
(CA BusLocal)
0
1
X
DATA M A P PI NG
Status Bit
Auto Mode
(Bus Control)
1
1
0
1TG C 9 0 8 0 0 4 M 0 2 0 1