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SEMI E54.1-1000 © SEMI 1996, 2000 21 GetAttr ibute Service Mess age Definition Table* Parameter Req/Ind Rsp/Conf Description AttributeI D M C**, = Attribute Identif ier of attribute w hose value is being re quested. Incl…

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SEMI E54.1-1000 © SEMI 1996, 2000 20
7.3.1.23.5 The UTC with Time Displacement Factor (TDF) (Type 3) uses the above format followed by 16 bits to
represent the number of minutes displacement from the Greenwich Meridian. Meridians to the East are positive,
while those to the West are negative.
7.3.2 DM Object Services — All DM object instances must provide the services listed in Table 23. (The DM object
is the “service provider” of these services.) Note that all of these services are Request services, with the exception of
the PublishAttribute service (which is a notification service). DM services are identified with a service identifier of
the form “DmSn”, where “n” is a positive decimal number. Dm service identifiers DmS1 through DmS8 are used by
this common device model standard. DM service identifiers DmS9 through DmS32 are reserved. Service parameters
that are specified in this standard are summarized in Table 24.
Table 23 DM Object Service Resource Definition
Service Service
Identifier
Required Type Description
Reset DmS1 Y R Used to place object in INITIALIZED state.
Abort DmS2 Y R Used to place object in ABORT state.
Recover DmS3 Y R Used to move object from ABORT state to RECOVERED state.
GetAttribute DmS4 Y R Used to read object attribute.
SetAttribute DmS5 Y R Used to modify object attribute.
Execute DmS6 Y R Used to move object from IDLE state to EXECUTING state.
PerformDiagnostics DmS7 Y R Used to instruct object to perform diagnostic test.
PublishAttribute DmS8 N N Used to proactively report exception status attribute.
Lock DmS9 N R Used to restrict access to READ only attributes.
Unlock DmS10 N R Used to make READ only attributes modifiable.
Get Exception Queue DmS11 N R Used to retrieve all, or a specified number of, exception events
from the front of the ExceptionDetailAlarm/WarningQueue.
Clear Exception
Queue
DmS12 N R Used to clear all exception events from the ExceptionDetail Alarm
or WarningQueue.
Reserved by CDM DmS13 –
DmS32
— — Reserved for CDM expansion.
Table 24 DM Object Service Parameter Dictionary
Parameter Form Description
AttributeID Enumerated DM object attribute identifier (see Table 17)
AttributeValue Context-specific (see Table 17) Value of DM object attribute.
TestID Non-negative integer, < 256 Type and possibly detail of diagnostic test to be performed.
A detailed description of these services follows.
7.3.2.1 Reset (Service Identifier: DmS1) — Used to place the DM object in its INITIALIZED state. There are no
parameters specified for this service.
7.3.2.2 Abort (Service Identifier: DmS2) — Used to place the DM object in its ABORT state. There are no
parameters specified for this service.
7.3.2.3 Recover (Service Identifier: D mS3) — Used to move the DM object from its ABORT state to a recovered
state (which is the IDLE state for this object). There are no parameters specified for this service.
7.3.2.4 GetAttribute (Service Identifier: DmS4) — Used to read a DM object attribute.
SEMI E54.1-1000 © SEMI 1996, 200021
GetAttribute Service Message Definition Table*
Parameter Req/Ind Rsp/Conf Description
AttributeID M C**, = Attribute Identifier of attribute whose value is being requested. Inclusion
of attribute in Rsp/Conf. is optional.
AttributeValue — M Value of attribute requested.
* See Section 6.4.3 for a further description of terminology used in this table.
** The determination of whether Attribute ID is supplied in the service response/confirm is outside the scope of this document.
7.3.2.5 SetAttribute (Service Identifier: DmS5) — Used to modify a DM object attribute.
Set_Attribute Service Message Definition Table*
Parameter Req/Ind Rsp/Conf Description
AttributeID M C, = Attribute Identifier of attribute whose value is to be modified. Inclusion
of Attribute in Rsp/Conf. is optional.
AttributeValue M C Value to which the attribute is to be modified. Inclusion of Attribute in
Rsp/Conf. is optional. Conditions under which the value may differ from
that supplied in the associated Req/Ind. message (e.g., negative response)
are not defined in this document.
* See Section 6.4.3 for a further description of terminology used in this table.
7.3.2.6 Execute (Service Identifier: DmS6) — Used to move the DM object from its IDLE state to its EXECUTING
state. Note that this service may be internally generated by the DM object. There are no parameters specified for this
service.
7.3.2.7 PerformDiagnostics (Service Identifier: DmS7) — Used to instruct the DM object to perform a diagnostic
test. A diagnostic test is either of type “common” or “device-dependent.” “Common” diagnostic tests could include:
RAM, EPROM, non-volatile memory, and communications. The structure of “common” type diagnostic tests is
implementation-specific. All detail of “device-dependent” diagnostics is outside the scope of this document. The
following table describes parameters specified for this service.
Perform_Diagnostics Service Message Definition Table*
Parameter Req/Ind Rsp/Conf Description
TestID M C, = Indicates the type and possibly detail of the test to be performed.
* See Section 6.4.3 for a further description of terminology used in this table.
Additional services and/or service parameters that are device-specific and/or implementation-specific may be
provided by a DM object. These services may be Notification or Request type services (see Section 6.4.1). A
complete definition of additional services and service parameters that are device-specific may be found in an
appropriate sensor/actuator network specific device model specification.
7.3.2.8 PublishAttribute (Optional — Service Identifier: DmS8) — Used to proactively communicate a DM object
attribute. The following table describes parameters specified for this service.
PublishAttribute Service Message Definition Table*
Parameter Ind Description
AttributeID M Attribute Identifier of attribute whose value is being reported.
AttributeValue M Value of attribute being reported.
* The utilization of a service response message and its format is outside the scope of this document.
SEMI E54.1-1000 © SEMI 1996, 2000 22
7.3.2.9 Lock (Optional) — This service is used to restrict network access to all READ only attributes of all objects
of this device. This service guarantees that the READ only attributes of this device are not modified over the
network. There are no parameters specified for this service.
7.3.2.10 Unlock (Optional) — This service is used to make READ only attributes of objects of this device
modifiable over the network. Not only is support of this object optional, but the degree to which it is supported is
also specified by the manufacturer (i.e., only some attributes may become “unlocked”). Table 25 describes the
parameters specified for this service.
Table 25 DM Object Unlock Parameter Definitions
Parameter Request/
Indication
Response/
Confirmation
Form Description
Password Key C C Manufacturer-
Specific
Password may be specified to restrict access or to
provide a manufacturer-specified security scheme.
7.3.2.11 GetExceptionQueue (Optional) — This service is used to read all or portions of the AlarmQueue and
WarningQueue elements. Table 26 describes the parameters specified for this service.
Table 26 DM Object GetExceptionQueue Parameter Definitions
Parameter Request/
Indication
Response/
Confirmation
Form Description
ExceptionType M C**, = Byte, enumerated0 = Alarm1 =
Warning
Used to indicate which exception queue is being
queried.
ElementNumb M M unsigned integer < 65,536 Used to indicate the number of Exception queue
events to be returned with the service response. A
zero value implies that all elements in the queue
should be returned.
ExceptionList — M List of elements; element data
type.
Dependent on the Reporting
Mode (Basic or Expanded —
See Sections 7.3.1.12, 7.3.1.19,
7.3.1.20, and 7.3.3).
An array of exception queue events of size
ElemNumb returned with the response.
Clear M C Boolean Used to indicate whether or not the exceptions are
to be removed from the exception queue upon
reporting.
7.3.2.12 ClearExceptionQueue (Optional) — This service is used to clear all elements out of either the
AlarmQueue or WarningQueue. Table 27 describes the parameters specified for this service. If the ExceptionType
attribute is set to 0, 1, or 2 with the service request, the Alarm, Warning, or both queues respectively are cleared
completely of their members.
Table 27 DM Object Clear ExceptionQueue Parameter Definitions
Parameter Request/
Indication
Response/
Confirmation
Form Description
ExceptionType M C**, = Byte,
enumerated
0 = Alarm
1 = Warning
2 = Both
Used to indicate which exception queue(s) is/are to be
cleared.
7.3.3 DM Object Behavior — The DM object behavior is illustrated in Figure 6 and in Tables 28 and 29.