STRASBAUGH, INC.
7AF SECS/GEM Interface Ver. 1.9 February 19, 2002 3-3
Strasbaugh Confidential
3-3
3.3.4 Multi-Block Messages
Wherever the Host is supposed to send a single-block message, this Equipment will also accept multi-block format.
The maximum size for a single SECS message is approximately 1000 blocks (256,000 bytes).
3.3.5 Function Zero
The Equipment sends a Reply Message using Function zero (F0) according to the requirements of the GEM Control State.
Wherever this Equipment expects a Reply message from the Host, the Host can send F0. The Equipment will instantly
abort the outstanding transaction. The Equipment will not take any additional action.
3.4 GEM Standard
The SEMI Generic Equipment Model for Effective Factory Automation (GEM) is another document published by SEMI.
The GEM standard defines some useful conventions for designing the communications interface on a unit of factory
Equipment to improve operations with a Host Computer. The 7AF complies to the following GEM document:
1. E30-0298 (GEM)
3.5 GEM Compliance
This section clarifies which GEM functions are implemented in this Equipment. See "GEM Compliance Statement" in
paragraph 3.5.
1. The 7AF never sends S2F25 (Loopback Diagnostic) to the Host. It will send the appropriate S2F26 in response
to an S2F25 from the Host.
2. The 7AF never sends S9F13 (Conversation Timeout) to the Host. The Equipment can be defined as having an
"infinite time-out" for conversations.
3. The 7AF will accept, but does not require the Inquire/Grant transaction (S2F39/S2F40, F5/S6F6, S7F1/S7F2)
for incoming primary multi-block messages.
To Next Page
