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SEMI E99-1104 E © SEMI 2000, 2004 5 7.3 Upstream C ontroller 7.3.1 The CIDRW provides certain services when requested by the upstream c ont roller. The upstream controller sends a message requesting t he specified servic…

SEMI E99-1104

6.3.4 Service Message Definition

6.3.4.1 A service message definition table defines the parameters used in a service, as shown in the following table:

Parameter Req/Ind Rsp/Cnf Comment

6.3.4.2 The columns labeled REQ/IND and RSP/CNF link the parameters to the direction of the message. The

message sent by the initiator is called the “Request”. The receiver terms this message the “Indication” or the request.

The receiver may then send a “Response” which the original sender terms the “Confirmation”.

6.3.4.3 The following codes appear in the REQ/IND and RSP/CNF columns and are used in the definition of the

parameters (e.g., how each parameter is used in each direction):

Code Description

M Mandatory Parameter — Must be given a valid value.

C Conditional Parameter — May be defined in some circumstances and undefined in others. Whether a value

is given may be completely optional or may depend on the value of the other parameter.

U User-Defined Parameter.

- The parameter is not used.

= (For response only.) Indicates that the value of this parameter in the response must match that in the primary

(if defined).

7 Overview

7.1 The Carrier ID Reader/Writer Model defines the behavior and services (functions) for both Carrier ID Readers

and Carrier ID Reader/Writers. The Carrier ID Reader/Writer is a small intelligent system, typically used as a

subsystem within equipment.

7.1.1 The primary functionality of the Carrier ID Reader/Writer is to read the identifier of the carrier (Carrier ID)

from the Carrier ID tag. Various technologies may be used to encode the Carrier ID and to read it. Some

technologies do not allow data to be written.

7.1.2 The acronym CIDRW is used to refer to both the Carrier ID Reader and the Carrier ID Reader/Writer. The

requirements for the Carrier ID Reader are a subset of the requirements for the Carrier ID Reader/Writer.

7.1.3 An object model for the CIDRW is provided in Related Information 2 – Object Model.

7.2 Number of Heads

7.2.1 A Reader/Writer Head is a device that is positioned on a load port for reading or reading/writing information

from a Carrier ID tag. A Carrier ID Reader/Writer provides one or more ID Reader/Writer Heads and is connected

to an upstream controller by a single interface. This allows the upstream controller to control either one head or

multiple heads using the same interface specification.

7.2.2 Single Head Configuration

7.2.2.1 In the case of a single head, the head may be presented as an integrated part of the CIDRW.

7.2.3 Multiple Head Configuration

7.2.3.1 In the case of multiple heads, some services are logically performed by the CIDRW, and the individual

heads logically perform others. The individual heads are numbered sequentially and may be referenced individually

by the upstream controller. Note that the upstream controller does not communicate directly with the heads. All

communications are between the upstream controller and the CIDRW unit.

7.2.3.2 In the multi-head case, the CIDRW shall allow independent control of the heads. Multiple transactions

invoking services performed by the individual heads may be open at the same time. For example, when a read

command is sent to one head, the host can send additional commands such as a read command and a status

confirmation command to another head before the first head sends the response to the first command.

SEMI E99-1104

7.3 Upstream Controller

7.3.1 The CIDRW provides certain services when requested by the upstream controller. The upstream controller

sends a message requesting the specified service, and the CIDRW sends a message with the response.

7.3.2 This standard assumes that an upstream controller initiates each service message to the CIDRW, and the

CIDRW sends its response to the upstream controller. The upstream controller must watch the response time to

monitor the communication timeout. This standard will define the recommended method for handling exceptions

caused by timeouts.

7.3.3 In addition, some CIDRW may provide asynchronous notification to the upstream controller. Examples of this

include, but are not limited to, the detection of a fault condition resulting in an alarm. Asynchronous notification is

not required for compliance to this standard.

8 Attributes

8.1 An attribute is an item of information about an entity that is maintained and is available by request. There is

certain information concerning the CIDRW that is of potential interest to the upstream controller, including the

manufacturer, the model, and the serial number of the device. This information is considered as attributes of the

CIDRW and is available on request.

8.2 CIDRW Attribute Definition Table

8.2.1 Table 1 defines the attributes of the Carrier ID Reader/Writer subsystem.

Table 1 CIDRW Attribute Definitions

Attribute Name Description Access Reqd Form

Fundamental

Configuration Number of heads. RO Y Text

Alarm Status Current CIDRW substate of ALARM

STATUS.

RO Y Enumerated:

0 = NO ALARMS

1 = ALARMS

Operational Status Current CIDRW substate of

OPERATIONAL.

RO Y Enumerated:

IDLE

BUSY

MAINTENANCE

SoftwareRevisionLevel Revision (version) of software. RO Y Text

Optional

CarrierIDOffset

Offset position of the first byte for Carrier

ID in the Electric Tag.

RW N 00-15

CarrierIDLength

Length byte of the Carrier ID.

If non-visible ASCII character exists in

this string, CIDRW shall send out an error

to the upstream controller.

RW N 01–16

DateInstalled Date the subsystem was installed. RO N Protocol dependent.

Device Type Identifiers subsystem as either a Carrier ID

Reader or a Carrier ID Reader/Writer.

RO N Text

HardwareRevisionLevel Revision number of the hardware. RO N Text

MaintenanceData Supplier dependent. RO N Text

Manufacturer The name or identifier of the manufacturer. RO N Protocol dependent.

ModelNumber The manufacturers model designation. RO N Text

SerialNumber Subsystem serial number assigned by

manufacturer.

RO N Protocol dependent.

SEMI E99-1104

8.3 Read/Write Head Attributes

8.3.1 Table 2 defines the attributes for the Read/Write Head.

NOTE 2: In the case of an integrated single head, the attributes in Table 2 are regarded as an extension of Table 1.

8.3.2 In the case of multiple heads, it must be possible to distinguish between the attributes of different heads.

Table 2 Read/Write Head Attribute Definitions

Attribute Name Description Access Reqd Form

Fundamental

HeadStatus The current state. RO Y Enumerated:

IDLE,

BUSY,

NOT OPERATING

HeadID Head number 0–31 RO Y if

multi-head

Text. 2 digits.

Optional

Cycles Number of read and write operations

performed.

RO N Unsigned integer

HeadCondition The current Maintenance status. RO N Enumerated:

No alarms

Needs Maintenance

Read/Write fault

Read/Write rate fault

No power.

HeadDateInstalled Date this head was installed. RO N Protocol dependent.

HeadMaintenance-

Data

Supplier dependent RO N Text

9 State Models

9.1 To facilitate independent control of the individual heads, this section defines two separate state models, one for

CIDRW subsystem and one to be applied to each of the individual heads.