Specifications

updates to do. If no update command is pending when entering the UPDATE
phase, then this time is dedicated to receiving more changes from the system.
·
As soon as the ALG:UPD:IMM command is received, no further changes are
accepted until all updates are complete. A query of an algorithm value following
an UPDate command will not be executed until the UPDate completes; this may
be a useful synchronizing method.
·
When Accepted: Before or after INIT.
·
Related Commands: ALG:UPDATE:WINDOW, ALG:SCALAR,
ALG:ARRAY, ALG:STATE and ALG:SCAN:RATIO, ALG:DEF (with
swapping enabled)
Command
Sequence
The following example shows three scalars being written with the associated update
command following. See ALG:UPD:WINDOW.
ALG:SCAL ALG1’,’Setpoint’,25
ALG:SCAL ‘ALG1’,’P_factor’,1.3
ALG:SCAL ‘ALG2’,’P_factor’,1.7
ALG:UPD
ALG:SCAL? ‘ALG2’,’Setpoint’
ALGorithm:UPDate:CHANnel
ALGorithm:UPDate:CHANnel <dig_chan> This command is used to update
variables, algorithms, ALG:SCAN:RATIO, and ALG:STATE changes when the
specified digital input level changes state. When the ALG:UPD:CHAN command is
executed, the current state of the digital input specified is saved. The update will be
performed at the next update phase (UPDATE in Figure 6-1), following the
channel’s change of digital state. This command is useful to synchronize multiple
VT1419As when it is desirable for all variable updates to be processed at the same
time.
VT1419A Command Reference
ALGorithm
200 Chapter 6
Figure 6-1: Updating Variables and Algorithms
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