INFICON BCG450-SP ATM to Ultra-High Vacuum Triple Gauge (Profibus) - Manual (Page 34)

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tira41e1 (2005-06) BCG450SPv1.cp
If the pressure drops below the set threshold, the relay is activated (normally open
contact closed). If the pressure then rises above the set threshold with a hysteresis
of 10%, the relay is deactivated again (normally open contact open).
Bit Definition
0 0
1 Low Alarm Exception: 0 = cleared, 1 = set
2 0
3 Low Warning Exception: 0 = cleared, 1 = set
4 0
5 0
6 0
7 0
Description
→ Instance 1.
Description
→ Instance 1.
This parameter is always on "1".
Defines whether the relays are controlled by the according potentiometer or by the
result of the comparison between atmosheric pressure sensor and the vacuum
(CDG) pressure value.
Byte value Definition
0 Setpoint function
1 atmosphere control (default)
1)
If atmosphere control
1)
is activated and the pressure of in the process chamber
(active sensor instance) falls below the process value of this instance 5 or 6, the
relay will be closed.
The relay is opend if any of the sensor alarms occurs. The device state
has to be EXECUTING to enable the relay to close.
1)
General description of Atmosphere control
→ [3].
If the pressure value (active value) is within a "window" specified by this attribute
from the atmosphere pressure sensor value (instance 4), the relay will be closed.
3.2.5.2 Status
3.2.5.3 Data Type
3.2.5.4 Data Unit
3.2.5.5 Reading Valid
3.2.5.6 Setpoint Function
3.2.5.7 "Percentage of
Atmosphere"