VXi VT1422A 사용자 설명서

requests an immediate update of any scalar, array, 

algorithm code, ALG:STATE, or ALG:SCAN:RATIO changes that are pending.

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Variables and algorithms can be accepted during Phase 1-INPUT or 

Phase 2-UPDATE in Figure 7-1 when INIT is active. All writes to variables and 
algorithms occur to their buffered elements upon receipt. However, these 
changes do not take effect until the ALG:UPD:IMM command is processed at 
the beginning of the UPDATE phase. The update command can be received at 
any time prior to the UPDATE phase and will be the last command accepted. 
Note that the ALG:UPD:WINDow command specifies the maximum number 
of 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.

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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.

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When Accepted: Before or after INIT. 

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Related Commands: ALG:UPDATE:WINDOW, ALG:SCALAR, 

ALG:ARRAY, ALG:STATE and ALG:SCAN:RATIO, ALG:DEF 
(with swapping enabled)

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Send with VXIplug&play Function: hpe1422_cmd(...)

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'

4

OUTPUT

output table

sent to SCP

channels

4

OUTPUT

output table

sent to SCP

channels

1

INPUT

from SCP
channels,

analog &

digital

1

INPUT

from SCP
channels,

analog &

digital

2

UPDATE

variables &
algorothms

Set by ALG:OUTPUT:DELay (if any)

Trigger Event

Trigger Event

3

EXECUTE ALGS

execute all enabled algorithms