VTI Instruments EX1000A, User Manual

Page: 248 / 320

VTI Instruments Corp.
248 EX10xxA/RX1032/EX1044 Function Calls
vtex10xxA_set_limit_set1
F
UNCTION
P
ROTOTYPE
ViStatus vtex10xxA_set_limit_set1(ViSession vi , ViInt32 channels[] , ViInt32 numChannels , ViReal64
lower_limit , ViReal64 upper_limit );
F
UNCTION
P
ARAMETERS
vi = contains a session handle to the instrument. This handle is obtained by the function and remains valid until the
session is closed.
channels = an array to receive the requested scan list. Valid input values: 0 through 47.
numChannels = an integer output value indicating how many channels are in the scan list. Valid input values:
1 through 48.
lower_limit = sets the value for the lower reading limit. The limit is tripped if the applicable channel reading is less
than the lower reading limit. For proper operation, the limit value must be entered in the same units as the channels
with which it is associated. Valid input values: -3e+38 through 3e+38.
upper_limit = the value for the upper reading limit. The limit is tripped if the applicable channel reading is greater
than the upper reading limit. For proper operation, the limit value must be entered in the same units as the channels
with which it is associated. Valid input values: -3e+38 through 3e+38.
D
ATA
I
TEM
R
ESET
V
ALUE
lower_limit = -3e+38 (for all channels) upper_limit = -3e+38 (for all channels)
D
ESCRIPTION
This function sets the limit set 1 values for the specified channels. A channel’s limit values can be set regardless of
its inclusion in the scan list, and multiple channels can be assigned to the same limit values with a single function
call. However, each unique combination of limit values must be set with a separate function call.
Unlike limit set 0, the limit values for limit set 1 are always set manually.
For proper operation, limit values must be entered and maintained in the same units as the channels with which they
are associated. Once entered, limit values are not automatically converted by subsequent changes in EU conversion
or units designations.
E
XAMPLE