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SEMI E30-1103 © SEMI 1992, 2003 70 LINE with an S1,F2 or deny ON-LINE by sending an S1,F0. 23 When the equipment is ON-LINE, the host m ay request that it transition to OFF-LINE . It will transition into the HOST OFF-LIN…

SEMI E30-1103 © SEMI 1992, 2003

Request or Delete Spooled Data (MaxSpoolTransmit > 0):

This Scenario shows the affect of MaxSpoolTransmit < SpoolCountActual on the Spool Transmit process. For the

purpose of illustration, the value of MaxSpoolTransmit is 5 and the SpoolCountActual is 8 (at the time

communications are re-established). No messages are added to the Spool during the transmit process.

COMMENTS HOST EQUIPMENT COMMENTS

Communications were lost and then re-established.

Host requests data that

includes spool-related

status variables. S1,F3-->

<--S1,F4 Send status data (e.g.

SpoolCountActual = 8, MaxSpool-

Transmit = 5).

Host requests spooled data

(RSDC=0). S6,F23-->

<--S6,F24 Request spooled data

acknowledgement.

The five oldest messages in the

Spool are transmitted to the

host. Spooling remains active.

Host recognizes that MaxSpoolTransmit

is reached.

Host requests additional S6,F23-->

spooled data (RSDC = 0).

<--S6,F24 Request spooled data

acknowledgement.

The three remaining messages

are transmitted from the spool.

<--S6,F11 Spooling Deactivated event

report sent.

Acknowledge S6,F12-->

4.12 Control — The control-related capabilities allow

for configuration and manipulation of the control state

model. In this way the host and/or user may modify the

equipment’s control-related behavior.

4.12.1 Purpose — This section complements the

CONTROL state model description found in Section

3.3. It defines the requirements for implementation of

this model.

4.12.2 Definitions — None.

4.12.3 Description

4.12.3.1 Control Configuration — The control state

model has two areas of configuration. The first area is

related to default entry states of the state model. Upon

system initialization, the system must activate either the

ON-LINE or OFF-LINE state. Upon entry to OFF-

LINE, the system must in turn activate one of the

substates of OFF-LINE (EQUIPMENT OFF-LINE,

ATTEMPT ON-LINE, or HOST OFF-LINE). In both

these cases, the user shall configure the equipment to

make the choices appropriate to that factory. Entry to

the ON-LINE state also involves a choice of substates.

In this case, the equipment reads the front panel

REMOTE/LOCAL switch to determine the appropriate

state.

The second area of configuration involves the transition

to be made if the ON-LINE attempt should fail. The

model may be set to transition to either HOST OFF-

LINE or to EQUIPMENT OFF-LINE should the S1,F1

transaction be terminated unsuccessfully. Choosing

HOST OFF-LINE allows the host to cause the

equipment to transition to ON-LINE when the host

becomes ready. This is accomplished via the message

S1,F17 (see below).

4.12.3.2 Changing Control State — In the control state

model, both the operator and the host can affect the

control state. The operator retains ultimate authority to

set the equipment OFF-LINE by means of an OFF-

LINE switch mechanism. The operator also can cause

the equipment to attempt to go ON-LINE. Under some

circumstances, the host can initiate the transition to

ON-LINE.

If the operator requests ON-LINE, the equipment will

send an S1,F1 to the host. The host may confirm ON-

SEMI E30-1103 © SEMI 1992, 2003

LINE with an S1,F2 or deny ON-LINE by sending an

S1,F0.

When the equipment is ON-LINE, the host may request

that it transition to OFF-LINE. It will transition into the

HOST OFF-LINE substate. When the equipment

HOST OFF-LINE state is active, the host may request

that it transition to ON-LINE. The combination of these

two allow the host to cycle the equipment between ON-

LINE and OFF-LINE.

Only the operator may change the ON-LINE substate

(REMOTE or LOCAL).

4.12.4 Requirements

— The equipment shall supply a method for

configuring the default CONTROL state to be

activated upon system initialization. The choice of

states must be among ATTEMPT ON-LINE,

EQUIPMENT OFF-LINE, HOST OFF-LINE, and

ON-LINE.

— The equipment shall supply a method for

configuring which state should be activated when

the attempt to go ON-LINE fails. The option is a

transition to either the HOST OFF-LINE state or the

EQUIPMENT OFF-LINE state.

— The equipment shall supply a momentary switch

which will initiate the transition to OFF-LINE and

another which will begin the process to go ON-

LINE. Discrete position switches shall not be used.

These should be designed so that they may not be

actuated simultaneously. The switch may be

mounted on the front panel or be available via

keyboard input at the operator console.

— The equipment shall supply a discrete two-position

switch which the operator may use to indicate the

desired substate for ON-LINE (i.e., REMOTE or

LOCAL). The switch may be mounted on the front

panel or be available via keyboard input at the

operator console. If implemented in software, this

setting shall be retained in non-volatile storage.

— The equipment shall supply an indicator on the front

panel which displays the full identification of the

current CONTROL state/substate (e.g., OFF-

LINE/ATTEMPT ON-LINE). This may be

accomplished either with labelled display lights or

23 If there is no host response (i.e. reply timeout), the equipment shall

treat it as a denial.

via the operator console display. It is recommended

that this indicator be visible at all times.

— The equipment shall supply a status variable that

contains the current state/substate of the CONTROL

state model.

— Whenever the ON-LINE/REMOTE state is active

and the operator issues a command to the

equipment, the equipment shall cause an “operator

command issued” event.

4.12.5 Scenarios

4.12.5.1 Operator-Initiated Scenarios

Host Accepts ON-LINE:

COMMENTS HOST EQUIPMENT COMMENTS

Operator actuates ON-LINE switch when equipment OFF-LINE state is active.

<--S1,F1 Equipment requests ON-LINE.

Host grants ON-LINE. S1,F2-->

<--S6,F11 “Control State LOCAL (or

REMOTE)” event.

Acknowledge. S6,F12-->

Host Denies ON-LINE:

COMMENTS HOST EQUIPMENT COMMENTS

Operator actuates ON-LINE switch when equipment OFF-LINE state is active.

<--S1,F1 Equipment requests ON-LINE.

Host denies ON-LINE. S1,F0-->

Operator Sets OFF-LINE:

COMMENTS HOST EQUIPMENT COMMENTS

Operator actuates OFF-LINE switch when equipment ON-LINE state is active.

<--S6,F11 “Equipment requests OFF-LINE”

event.

Acknowledge. S6,F12-->

Operator Sets REMOTE:

COMMENTS HOST EQUIPMENT COMMENTS

Operator sets switch from LOCAL to REMOTE.

<--S6,F11 “Control State REMOTE” event.

Acknowledge. S6,F12-->

Operator Sets LOCAL:

COMMENTS HOST EQUIPMENT COMMENTS

Operator sets switch from REMOTE to LOCAL.

<--S6,F11 “Control State LOCAL” event.

Acknowledge. S6,F12-->