INFICON BCG450-SD ATM to Ultra-High Vacuum Triple Gauge (DeviceNet) User Manual

Page 30

tira40e1 (2005-04) BCG450SDv1.cp

Service

Code

Service Name

Description of Service

Set Emission

Control Mode

• Automatic

The Emission is switched on and off by the
Pirani automatically.

• Manual

The emission has to be switched on and off
by the user

Parameter

Data Type

Description

Semantics of Values

Emission

User Mode

State

BOOL

→ below

Automatic Mode (default)

Manual Mode

Automatic:

The emission is automatically switched ON and OFF.
The user can switch the emission OFF by using the Set Emission
State service.
If the emission is switched off manually, the emission will be automa-
tically switched on again, after the pressure rose above 3.2

×10

-2

mbar

and falls below 2.4

×10

-2

mbar again.

Manual:

The emission has to be switched on and off by the user, using the Set
Emission State service. The Set Emission State service may be
executed only, if the pressure is below 2.4

×10

-2

mbar. If the pressure

is higher, an Object State Conflict error will be returned.

If the emission is switched on and the pressure rises above 3.2

×10

-2

mbar, the

gauge will switch off the emission automatically.

The following behavior with respect to Data Type applies:

The Data Type value will be set automatically based upon the first valid I/O con-
nection established by the device.

If no established I/O connections exist, which include an attribute from this object,
then the Data Type attribute is settable provided that the object is in the Idle State.

The following example demonstrates this behavior:

A device specifies an instance of the S-Analog Sensor object as well as two static
Assembly object instances, both with data attribute components mapped to this
object instance. Assembly object instance ID 1 specifies INT data types and As-
sembly object instance ID 2 specifies REAL data types.

After the device is online, it is configured with an I/O connection to Assembly in-
stance ID 2. When the connection transitions to the Established State, this object
instance attribute Data Type is automatically set with the value for REAL before
any data is communicated to, or from the object instance. Any subsequent attempt
to connect to Assembly instance ID 1 would then be rejected and result in an
INVALID ATTRIBUTE VALUE error with the additional error code indicating the ID
of the offending attribute, which in this case would be the connection path.

2.4.4.3 Emission Control Mode

Set Emission Control Mode
Data Field

Emission User Modes

2.4.5 Behavior

Data Type