Spectrum 1746sc-CTR4, Owner'S Manual, Page: 29 / 66

Chapter 4: Channel Configuration, Data, and Status
29
Figure 4.2 - Configuration Word Settings
Scale
/ L
i
m
it
M
ode
Roll
under
to
Roll
over
to
Directrion
Count
Si
z
e
Filter
Sto
p
on
L
i
m
it
Sto
p
on
Z
ero
Count
M
ode
In
p
ut
Ran
g
e
Rate
M
ode
Reset
Fla
g
s
P
reset
Counter
E
na
b
le
0 = Instant
1 = Average
0 = Start
1 = Stop
0 = Off
1 = On
00 = AC
01 = 5 V
10 = 12V
11 = 24V
0 = Normal
1 = Reset
00 = UniDirect
01 = BiDirect
10 = Quad x1
11 = Quad x4
0 =Normal
1 = Program
0 = Neg
1 = Prese t
0 = Zero
1 = Preset
0 = Normal
1 = Inverted
0=Standard
1=Extended
0 = 50kHz
1 = 30kH z
0 = Off
1 = O n
0 = Off
1 = On
Address
Channel 0 Configuration Word O:e.x
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Counter Start/Stop: (Configuration Bit 0)
This bit allows the counter to continue to count up or down from its
present value.
Note: Starting or enabling the counter with this bit will not override the
external counter enable input. The external input enable and the counter
start bit must both be enabled for the counter to continue counting. If
either the counter stop bit or the external input enable line are disabled
the counter will hold it’s last value and stop counting.
Counter Preset: (Configuration Bit 1)
When this bit is set, the value in counter preset word is loaded into the
counter. The counter preset can be used to set the counter to an initial
starting value. The bit should be set for at least 2 I/O scans. The bit can
be held on until the data in the counter data is verified to be equal to the
preset value. The counter will hold the preset value until the counter
preset bit is turned off. At this time normal counter functions will resume.
Note: A Counter Reset function is achieved by using the Counter
Preset, when the preset value is set to zero.
Refer to the Preset and Limit Data Value Configuration section for more
information about loading your preset value.