STRASBAUGH, INC.
7AF SECS/GEM Interface Ver. 1.9 February 19, 2002 5-31
Strasbaugh Confidential
5-31
5.12 Spooling
When the SECS link between the Host and the 7AF goes down (RTY error on the Equipment side), the 7AF will spool
appropriate messages so that the Host can read them once the link comes back up (after a successful Connect Request
transaction).
The Host can set spooling attributes on the 7AF by setting certain Equipment Constants with the S2F15/16 transaction.
The Host can define streams and functions of messages to be spooled through the S2F43/44 transaction. Stream one
(S1Fx) messages are not eligible for spooling. The Host can also disable spooling for messages through this S2F43/44
transaction. Stream 9 messages are not spooled.
The Host may read spooled messages or purge the Equipment's spool through the S6F23/24 transaction.
5.12.1 A Word of Caution
If the Host does not intend to use the spooling features of the Equipment, the Equipment Constant ConfigSpool (VID 53)
should be set to zero. Setting this EC to zero disables the spooling feature. If this is not set to zero, and the Host does not
support spooling, the SECS connection with the Equipment will be crippled. This happens because of the following:
1. When spooling becomes active (transmission error), the Equipment will not send non-stream 1 primary messages
to the Host. That is, it will not send, events, alarms, process programs, terminal display, etc.
2. When spooling becomes active, the ONLY way to deactivate it is to read or delete the spool from the Host. In
complying with the GEM standard, the Equipment does not have the ability to reset its spooling state.
3. Therefore, if your Host does not support spooling and spooling becomes active, you will never again receive non
stream 1 messages from the Equipment. If this occurs, you will need to use a Host simulator such as SECSIM to
delete the spool.
If the Host does not intend to use the spooling features of the 7AF, CONFIGSPOOL (VID 53) should be set to zero. This
will disable the spooling feature and the Equipment will never transition to Spool Active state. After a transition is made
to Spool Active, the only way to get out of the state is to read or purge the spool.
5.12.2 Spooling Sequence
Messages are sent to the spool only if the Host has enabled these messages for spooling. This precondition will not be
repeated throughout this section. Assume that the messages referred to in this section have been enabled for spooling.
While spooling is active, the Host may initiate primary messages and the 7AF will respond, if it is in the
COMMUNICATING state.
5.12.2.1 SPOOLING STARTS
When a transmission failure occurs, the first message sent to the spool is the event message SPOOLINGACTIVATED
(CEID 5005). The next message sent to the spool is the message which caused the communications failure. The
following table depicts the activity at the 7AF when spooling starts.
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