Balluff BVS ID-M1280 F1 Series, Configuration Manual

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BVS ID-M1280xF1-xx-xxx
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4.1.4 Event messages from BVS ID
4.1.4.1 Status message
For each status change and upon request BVS ID sends a status message.
Get the current status.
Length in bytes Structure Value Description
2 UINT16 12
hex
Message ID
2 UINT16
00
hex
User data length in bytes
BVS ID answers with a status message. If activated, such a status message is also sent without explicit request
each time status changes.
Length in bytes Structure Value Description
2 UINT16
12
hex
Message ID
2 UINT16
02
hex
User data length in bytes
2 UINT16 Status word. A set bit indicates that the status is active (see the following table).
Structure of status word:
Value
(dec)
Value
(hex)
Bit Name Description Reset to binary "0"
1 01 00 0
Waiting For
Trigger
This bit signals that BVS ID is waiting for a
trigger signal, i.e. is ready to acquire an
image.
Automatically, as soon as a trigger signal is no
longer awaited.
8 08 00 3
Simulation
Mode
This bit signals that "File Device" is selected
as image source. The simulation ("File
Device") can be used to display stored
images.
Automatically, as soon as a different image
source is selected.
•
•
NOTE
BVS ID supports two different modes of operation regarding status messages:
Push: If the option " Send status information automatically" is activated, a status message is sent
each time a status changes. The latest sent status is therefore valid until a new status is sent.
The controlling system must expect a status message at any moment in the communication
flow, but it cannot miss a status change.
Pull: If the option "
Send status information automatically" is deactivated, status messages are
solely sent upon an explicit request. The controlling system is responsible to request the status
at a feasible point during the communication flow. It does not know how long the status remains
valid. If the controlling system requests the status message at a moment where result containers
are sent, the result container may be sent in between the status request and the status
message.
A mix of push and pull mode is possible.
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