STRASBAUGH, INC.
7AF SECS/GEM Interface Ver. 1.9 February 19, 2002 7-1
Strasbaugh Confidential
7-1
7. SECS Scenarios
Unless otherwise noted in this section, the Communications State is "Communicating" and the Control state is either "On-
Line/Local" or "On-Line/Remote".
7.1 Equipment Communications
7.1.1 Equipment Establishes Communications
Assumption: Equipment's Communication state is "Enabled/Not Communicating".
Step SECS Message Description
1. H<-E S1F13 W Equipment attempts to send Establish Communications Request.
2.
If the send is not successful, or if no reply is received from the Host, wait
"ESTABLISHCOMMUNICATIONSTIMER" seconds, then go to step 1.
3.
H -> E S1F14
The Host responds with Establish Communications Acknowledge. If
COMMACK in this message is non-zero, wait
“ESTABLISHCOMMUNICATIONSTIMER" seconds, then go to step 1. If
COMMACK is zero, proceed to the next step.
4.
Communications is successfully established. The Equipment changes its
communication state to Communicating. Normal SECS message processing
begins.
7.1.2 Host Establishes Communications
Assumption: Equipment's Communication state is either "Enabled/Not Communicating" or "Enabled/Communicating".
Step SECS Message Description
1. H -> E S1F13 W Host sends Establish Communications Request.
2.
H <- E S1F14
The Equipment responds with Establish Communications Acknowledge, with
COMMACK set to zero. After this message is successfully sent,
communications is established. If the current communication state is "Not
Communicating", the Equipment changes its communication state to
"Communicating". If the state is "Communicating", no change in
communication state occurs. In either case, subsequently received messages
are processed normally.
7.1.3 Simultaneous Establish Communications
Assumption: Equipment's Communication state is "Enabled/Not Communicating".
Step SECS Message Description
1. H <- E S1F13 W Equipment sends Establish Communications Request.
2. H -> E S1F13 W Host sends Establish Communications Request.
3.
H <- E S1F14
The Equipment responds with Establish Communications Acknowledge, with
COMMACK set to zero. After this message is successfully sent,
communications is established. The Equipment changes its communication
state to Communicating.
4.
H -> E S1F14
The Host responds with Establish Communications Acknowledge, with
COMMACK set to zero. This step
could occur before step 3, in which case communications would be
established at this step.
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