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SEMI E30-1103 © SEMI 1992, 2003 61 Message fault due to data t oo long: COMMENTS HOST EQUIPMENT COMMENTS Host sends a message. Sx,Fy--> Equipment detects that the message from the host contains more data than it can h…

SEMI E30-1103 © SEMI 1992, 2003

Message Fault Due to Unrecognized Stream Type:

COMMENTS HOST EQUIPMENT COMMENTS

Host sends a message. Sx,Fy-->

Equipment detects an

unrecognized stream type within

the message from the host.

<--S9,F3 Equipment reports to the host

that an “unrecognized stream

type” was detected in the

received message.

Message Fault Due to Unrecognized Function Type:

COMMENTS HOST EQUIPMENT COMMENTS

Host sends a message. Sx,Fy-->

Equipment detects an unrecog-

nized function type within

the message from the host.

<--S9,F5 Equipment reports to the host

that an “unrecognized function

type” was detected in the

received message.

Message Fault Due to Illegal Data Format:

COMMENTS HOST EQUIPMENT COMMENTS

Host sends a message. Sx,Fy-->

Equipment detects illegal data

format within the message from

the host.

<--S9,F7 Equipment reports to the host

that “illegal data format” was

detected in the received

message.

Communication Fault Due to Transaction Timer Timeout:

COMMENTS HOST EQUIPMENT COMMENTS

Equipment does not receive an

expected reply message from the

host and a transaction timer

timeout occurs.

<--S9,F9 Equipment reports to the host

that a transaction timer

timeout occurred.

SEMI E30-1103 © SEMI 1992, 2003

Message fault due to data too long:

COMMENTS HOST EQUIPMENT COMMENTS

Host sends a message. Sx,Fy-->

Equipment detects that the

message from the host contains

more data than it can handle.

<--S9,F11 Equipment reports to the host

that “data too long“ was

detected in the received

message.

Communication Fault Due to Conversation Timeout:

COMMENTS HOST EQUIPMENT COMMENTS

Host sends a message. Sx,Fy-->

<--Sx,Fy+1 Equipment sends reply.

Equipment is now expecting a

specific message from the host

as a result of the previous

transaction. Equipment has not

received the expected message

from the host and a

conversation timeout occurs.

<--S9,F13 Equipment reports to the host

that a conversation timeout

occurred.

4.10 Clock — The clock capability enables host

management of time-related activities and occurrences

associated with the equipment and across multiple

pieces of equipment.

4.10.1 Purpose — The purpose of the clock capability

is to enable time stamping of collection event and alarm

reports. Time stamping is useful for resolving relative

order of event/alarm occurrences and scheduling of

equipment activities by the host.

The ability for the host to instruct the equipment to set

an internal clock to a specified time value, and for the

equipment to request the current date and time, is

needed for effective time management and

synchronization between host and equipment.

4.10.2 Definitions

Clock — Clock is a status variable containing the

current value of time at the equipment. Clock may be

included in report definitions and/or queried separately

by the host. See SEMI E5 for a full definition of this

variable data item and its required formatting.

TIME — TIME is a data item contained in messages

used by the host to set time at the equipment and by the

equipment or host to request the current time from the

other. (See SEMI E5 for a full definition of this data

item.)

4.10.3 Detailed Description — The clock capability

assumes the existence of a relative time reference on

the equipment. This time reference is used as a basis for

updating the time value of an equipment status variable

called “Clock.” The time reference must reflect the

current time to within a resolution range of seconds to

centiseconds (refer to the format for Clock in the SEMI

E5 Standard). The purpose of time stamping with

centiseconds is to resolve the order in which nearly

simultaneous events occur rather than to provide a more

precise record of the time of day at which they

occurred. Where more than one event occurs within a

given period of clock resolution, the centiseconds

reported in the time stamps for these events must reflect

the actual order in which the events were detected.

Equipment with a clock resolution of less than a second

should report centiseconds. Otherwise, centiseconds

should be assigned to reflect the relative order in which

events were detected. Equipment unable to resolve time

to less than a second and unable to reflect the relative

order in which events were detected may report

centiseconds as “00”.

SEMI E30-1103 © SEMI 1992, 2003

The host employs the “Date and Time Set Request”

message (S2,F31) to initialize the value of Clock to the

value contained in the TIME data item. Similarly, the

equipment may employ the “Date and Time Request“

message (S2,F17) to obtain a new initialization time for

Clock. As before, the value of TIME returned by the

host is used to set Clock. Note, in the event that the

precision of TIME is seconds and that for Clock is

centiseconds, in both cases the initial value of Clock

shall contain “00” for its Centisecond digits upon

initialization. Additionally, for any field in TIME that is

not supported by the equipment, the local value of this

field is equipment dependent. For example, Equipment

that cannot resolve time to less than a second might

round or ignore centiseconds and always set the

Centisecond field to “00”.

4.10.4 Requirements

— The resolution and update rate of the internal time

reference must be sufficient to distinguish between

two nearly simultaneous collection events and/or

alarms.

— The equipment supplier shall provide

documentation describing the resolution of the

internal time reference.

— The equipment supplier shall provide

documentation describing how centisecond values

are assigned, including the case of unresolvable

simultaneous events.

4.10.5 Scenarios

Equipment Requests TIME (Optional Scenario):

COMMENTS HOST EQUIPMENT COMMENTS

<--S2,F17 Equipment requests a time value

from the host.

Host responds with a TIME value S2,F18-->

Equipment sets its internal

time reference to the value of

TIME received from the host.

Host Instructs Equipment to Set Time:

COMMENTS HOST EQUIPMENT COMMENTS

Host instructs equipment S2,F31-->

to set its time.

<--S2,F32 Equipment sets its internal

time reference to the value of

TIME received from the host and

acknowledges completion.

Host Requests Equipment’s Current Time Value:

COMMENTS HOST EQUIPMENT COMMENTS

Host requests equipment time. S2,F17-->

<--S2,F18 Equipment returns its internal

time reference value to the

host.