GSE 60 SERIES Technical Reference Manual page 456

12-10 Chapter 12
GSE Scale Systems
50.6P=20%o
If the capacity of the scale is 500 lb, then a macro must be programmed to
divide the gross weight by 500 and copy the result to the duty cycle
register:
51.6P=0.0P/500%o
This macro could then be programmed to be executed at a rate acceptable
to the specific application through the use of a setpoint timer.
S (F
ETPOINT UNCTION
The setpoint mode of operation has no additional setup parameters. The
operation of the setpoint is governed by the associated setpoint, 131
through 138, as determined by the channel number. Refer to parameter
P5100 for the specific setpoint being used.
When this choice is made, the I/O channel operates the same as it has
operated in earlier firmware releases, before the Programmable I/O
feature was released.
F M
REQUENCY EASUREMENT
(F 3)
UNCTION
C P O
OUNT ULSES VER A
This frequency measurement method determines the frequency of the
input signal by counting the number of specified edges (i.e. rising or falling
edges) over a programmable time period. It provides a guarantee of a
new calculated frequency at a regular, specified interval. It is useful for
applications which need a continually updated indication of the input
frequency regardless of how high or low the frequency is.
The setup parameters that pertain to the 'FqInA' selection are:
P852: "FNam": Allows a name to be assigned to I/O parameter 50 which
is used to read the input frequency determined by this function.
P857: "CSrc": Specifies which clock will be used to time the period used
to measure the frequency for this channel. The effects of the two
alternatives are shown in Table 12-3.
2)
M
ETHOD
F T P
IXED IME ERIOD
'A'