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SEMI E54.3-0698 © SEMI 1998, 2004 21 8.12.1.4 Initial and Default Values Table 32 SISO-Setpoint Object Attribute Initial and Default Values Attribute Initial Value Default Value Comment Ramp Type LVV Disable Ramp Rate LV…

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8.11.1.2 Output — An attribute whose value is the output, or dependent variable, of the transfer function. The data
type is specified by the data type attribute.
8.11.1.3 Data Type — An attribute which specifies the data type of the input attribute and the output attribute. The
format and values of this attribute are defined in SEMI E54.1.
8.11.1.4 Initial and Default Values
Table 30 Table 30 SISO Object Attribute Initial and Default Values
Attribute Initial Value Default Value Comment
Input LVV 0
Output LVV manufacturer-specified
Data Type LVV manufacturer-specified
8.11.2 SISO Object Behavior — The only behavior defined at this level is that of a continuously operating transfer
function: The Output attribute value is calculated as a function of the Input attribute value. The specific transfer
function is defined by lower level objects which inherit from this object.
Output = F(Input)
where: F is the function specified
8.12 SISO-Setpoint Object — The SISO-Setpoint Object inherits from the SISO object. The definitions added by
the SISO-Setpoint object include the behavior associated with the transfer function.
8.12.1 SISO-Setpoint Object Attributes
Table 31 SISO-Setpoint Object Attributes
Attribute Name
Attribute
Identifier
Access Network
Required
Form
Ramp Type A33 RW No USINT
Ramp Rate A34 RW No Data Type
Ratio A35 RW No REAL
Reserved A36–A64 — — Reserved for future expansion.
8.12.1.1 Ramp Type (Optional) — An attribute which specifies a mechanism by which the output attribute is
ramped to the current value of the input attribute.
0 = Disable
1 = Time in seconds
2 = Amount per second
3–63 = Reserved
64–255 = Manufacturer-specified
8.12.1.2 Ramp Rate (Optional) — An attribute specified to define the ramp rate at which the SISO-Setpoint object
instance tracks towards the current input value. The ramp rate specifies how quickly the output is ramped from the
previous output value to the current input value. This attribute is expressed in terms of seconds or amount of change
per second.
8.12.1.3 Ratio (Optional) — An attribute which specifies the ratio multiplier to be applied to the input attribute
value prior to the application of the ramp transfer function.
SEMI E54.3-0698 © SEMI 1998, 2004 21
8.12.1.4 Initial and Default Values
Table 32 SISO-Setpoint Object Attribute Initial and Default Values
Attribute Initial Value Default Value Comment
Ramp Type LVV Disable
Ramp Rate LVV 0
Ratio LVV 1.0
8.12.2 SISO-Setpoint Object Behavior — The general behavior exhibited by the SISO-Setpoint object instance is
defined in SEMI E54.1. The specific behavior associated with this object is defined below.
8.12.2.1 SISO-Setpoint OPERATING Application Process–Ramp — The ramp type and ramp rate attributes
determine the conditions under which the value of the output attribute is calculated and modified by this application
process. The ramp rate attribute is defined to express the rate at which the output attribute is ramped to the value of
the input attribute based on the value of the ramp type attribute. Table 33 describes the behavior of the SISO-
Setpoint object instance based on the value of the ramp type attribute.
Table 33 SISO-Setpoint Object Behavior - Ramp
Ramp Type Value SISO-Setpoint Object Instance Behavior
Disabled Achieve a new output value in one step.
Time in Seconds Achieve a new output value in the time interval specified by the ramp rate attribute.
Amount per Second Achieve a new output value in the amount per second increments specified by the ramp rate
attribute.
8.12.2.2 SISO-Setpoint OPERATING Application Process–Ratio — Prior to the application of the Ramp
calculation, a multiplier is applied to the value of the input attribute. The value of the ratio attribute is multiplied to
the value of the input attribute, and the result becomes the value which is used in the ramp calculation.
The combined formula for the SISO-Setpoint object is as follows:
Output = F(x)
where: F is the function as defined by ramp type above
and: x = (ratio)(input)
8.13 Assembly-MFC Object — The Assembly-MFC object inherits attributes, services, and behavior from the
Assembly object. The Assembly object instance is the device component which provides a mechanism of grouping
more than one attribute from one or more object instances into a single data structure for communication over the
network.
8.13.1 Assembly-MFC Object Attributes
Table 34 Assembly-MFC Object Attributes
Attribute Name
Attribute
Identifier
Access Network
Required
Form
Data A1 R Yes Structure as defined below.
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8.13.1.1 Data — An attribute with the following list of attributes within its structure:
Table 35 Assembly-MFC Data List
Data Index Source Object ID Source Attribute ID Description
1 DM1 A12 Device Manager
Exception Status
2 MFD8 A1 Controller
Status
3 MFD3 A4 Sensor-AI-MF
Value
4 MFD8 A4 Controller
Setpoint
5 MFD8 A6 Controller
Control Variable
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