Rockwell Automation 1756-HSC ControlLogix High Speed Counter Module User Manual
Page 88
Rockwell Automation Publication 1756-UM007C-EN-P - November 2011
88 1756-HSC Data Structures
C.Preset[
x]
DINT
Decimal
Designates the Preset value. Module begins counting at
this value.
Values range from 0…16,777,214.
IMPORTANT: This value cannot be > the Rollover value. This
value also must = 0 when you are using Period Rate and
Continuous Rate modes.
Yes
C.Scaler[
x]
INT
Decimal
When using Frequency mode, set this value as a multiple of
10 ms between 10-2000. If in Frequency mode and the value
is 0, the module defaults to 1 second time base.
In Period Rate and Continuous Rate modes, the scaler
determines the number of half-cycles of the incoming pulse
train in the sample period. The 4 MHz count value in the
Present Value tag is incremented within the pulse train set
by the Scaler tag.
Acceptable numbers for the scaler are: 1, 2, 4, 8, 16, 32, 64,
128, 256. There is one Scaler value for each counter. The
default value for each Scaler is 1; a 0 is equivalent to 1.
Yes
C.OperationalMode[
x]
SINT
Decimal
Designates an operational mode.
0 = Counter mode.
1 = Encoder x1 mode.
2 = Encoder x4 mode.
3 = Counter not used.
4 = Frequency mode.
5 = Period Rate mode.
6 = Continuous Rate mode.
No
C.StorageMode[
x]
SINT
Decimal
Designates a storage mode.
0 = No store mode.
1 = Store and continue mode.
2 = Store, wait, and resume mode.
3 = Store and reset, wait, and start mode.
4 = Store and reset, and start mode.
Yes
C.ZInvert.
x
BOOL
Decimal
Designates whether the Z input is inverted.
0 = Do not invert Z input.
1 = Invert Z input.
Yes
C.FilterA.
x
BOOL
Decimal
Designates whether channel A uses a filter.
0 = Do not use filter.
1 = Use 70 Hz.
Yes
C.FilterB.
x
BOOL
Decimal
Designates whether channel B uses a filter.
0 = Do not use filter.
1 = Use 70 Hz.
Yes
C.FilterZ.
x
BOOL
Decimal
Designates whether channel Z uses a filter.
0 = Do not use filter.
1 = Use 70 Hz.
Yes
-
This setting may be overridden by the output tag setting. See
and
in Chapter 2 for details.
1756-HSC Module Configuration Tags
Name
Data
Type
Style
Definition
Change
During
Operation
(1)