Manual

3-42 Operating Characteristics
3.11.1 Related Variables
The following table lists the variables (SV's, EC's, or DVVALS) which are relevant
to material movement. For a more complete description of these variables, see
"Appendix A -- Variables".
Table 3-18 Material Movement Variables
Variable Name VID
CLOCK 27
GWGEM provides automated handling of synchronization of Equipment to Host
Date and Time ([RefGWGEMUser] p 163 ‘Clock’).
FmNT can synchronize with the Host using GemHostTimeReq. When time update
messages from the Host are not arriving, a time update request to the Host shall be
made approximately once per hour until the Host resumes time update messages.
GWGEM automatically updates FmNT's clock hardware.
3.12 Spooling
When the SECS link between the Host and the GES-1993 goes down (RTY error on
the Equipment side), the GES-1993 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 GES-1993 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.
When the SECS link between the Host and the Equipment goes down, the
Equipment will ‘spool’ (buffer) messages until the link is restored.
GWGEM maintains the Spooling finite state machine ([RefGWGEMUser] p 153
‘Spooling).