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Appendix C
Terminal Blocks
Terminal Module
Update
Update Queue
User Function
another of the same name while the original is
running. The "new" algorithm becomes active
after an update command is sent. This "new"
algorithm may again be swapped with another,
and so on. This capability allows changing
algorithm operation without stopping and leaving
this and perhaps other processes without control.
The screw-terminal blocks you connect your
system field wiring to. The terminal blocks are
inside the Terminal Module
The plastic encased module which contains the
terminal blocks you connect your field wiring to.
The Terminal Module then is plugged into the
HP E1415's front panel.
This is an intended change to an algorithm,
algorithm variable, or global variable that is
initiated by one of the commands
ALG:SCALAR, ALG:ARRAY, ALG:DEFINE,
ALG:SCAN:RATIO, or ALG:STATE. This
change or "update" is considered to be pending
until an update command is received. Several
updates can be sent to the Update Queue, waiting
for an update command to cause them to take
effect synchronously. The update commands are
ALG:UPDATE, and ALG:UPD:CHANNEL.
A list of scalar variable values, and/or buffer
pointer values (for arrays, and swapping
algorithms) that is built in response to updates
(see Update). When an update command is sent,
scalar values and pointer values are sent to their
working locations.
A function callable from the Algorithm Language
in the general form <function_name>(
<expression> ). These user defined functions
provide advanced mathematical capability to the
Algorithm Language
Glossary
345
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