2 device block, device behavior, Cyclic data traffic acyclic data traffic – INFICON BPG402-SP ATM to Ultra-High Vacuum Gauge (Profibus) User Manual
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tira47e1 (2005-08) BPG402SPv1.cp
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The BPG402-SP behaves as described in the status diagram below.
NORMAL
RUNNING
OK
SELFTESTING
EXECUTING
SELFTEST
EXCEPTION
ABORT
(0)
CRITICAL
FAULT
INIT
IDLE
(1
4
)
(1
3
)
(1
0
)
(8
)
(5)
(9)
(4)
(1
3)
(13
)
(2
)
(1
)
(3
)
After the start, the gauge independently runs through the INIT and SELFTESTING
status and eventually changes to the IDLE status (if there is no error) or to the
SELFTEST_EXCEPTION status (if there is a gauge error).
When data traffic is taken up, a difference has to be made between cyclic and
acyclic data traffic.
As soon as cyclic data interchange is taken up, the gauge automatically changes to
the EXECUTING status.
In acyclic data traffic, a START service has to be transmitted to bring the gauge to
the EXECUTING status.
3.1.2 Device Block,
Device Behavior
Cyclic data traffic
Acyclic data traffic