VXI VT1422A - Manual (Page 249)

VT1422A Command Reference 247 Chapter 7
ALGorithm
Note
If <alg_name> specifies an undefined algorithm, ALG:SIZE? returns 0. This can be
used to determine whether algorithm <alg_name> is defined.
•
Returned Value: numeric value up to the maximum available algorithm
memory (this approximately 40k words). The type is int32.
•
*RST Condition: returned value is 0.
•
Send with VXIplug&play Function: hpe1422_cmdInt32_Q(...)
ALGorithm[:EXPLicit][:STATe]
ALGorithm[:EXPLicit][:STATe] ’<alg_name>’,<enable> specifies that algorithm
<alg_name>, when defined, should be executed (ON) or not executed (OFF) during
run-time.
Notes
1. The command ALG:STATE <alg_name>, ON | OFF does not take effect until
an ALG:UPDATE or ALG:UPD:CHAN command is received. This allows
multiple ALG:STATE commands to be sent with a synchronized effect.
2. ALG:STATE places a variable update request in the Update Queue. Do not
place more update requests in the Update Queue than are allowed by the
current setting of ALG:UPD:WINDOW or a "Too many updates – send
ALG:UPDATE command" error message will be generated.
CAUTION When ALG:STATE OFF disables an algorithm, its control output is left
at the last value set by the algorithm. Depending on the process, this
uncontrolled situation could be dangerous. Make certain that the
process is in a safe state before halting the execution of a controlling
algorithm.
Parameters
Comments •
The algorithm specified by <alg_name> may or may not be currently defined.
The setting specified will be used when the algorithm is defined.
•
*RST Condition: ALG:STATE ON
Parameter
Name
Parameter
Type
Range of
Values
Default
Units
alg_name string ALG1 - ALG32 none
enable boolean (uint16) 0 | 1 | ON | OFF none