Rockwell Automation 1746-HSCE2 Multi-Channel High Speed Counter Module - Manual (Page 65)

Publication 1746-UM002B-EN-P - August 2004
Configuration and Programming 4-15
CNTR No.: Counter Number Bits
(Word 0, Bit 08 and 09)
These two bits select the counter to which this programming block is
applied.
Preset Value
(Words 5 and 6)
The preset value can be programmed to any number between the
minimum count value and the maximum count value. If the preset
value does not fall between the minimum and maximum count values,
a programming error results. The preset value is specified in the
two-word integer data format as described in Integer Format on page
4-3. This value may be changed with the counter running, if minimum
and maximum values are equal to their previously programmed
values.
Minimum/Maximum Count Value Words
(Words 1 to 4)
The valid range of the parameter is dependent upon the operating
class.
The minimum/maximum count value can be changed after the output
ranges have been programmed. However, they cannot be changed
while the counter is enabled. When the minimum/maximum values
are changed, they are checked against the ranges. If any of the new
values are outside the range boundaries, the new values are not
accepted, and the programming error bit is set. The preset value is
Table 4.6 Counter Number Bit Settings
Bit 09 Bit 08 Counter Number
0 0 Counter 1
0 1 Counter 2
1 0 Counter 3
1 1 Counter 4
Table 4.7 Minimum/Maximum Count Values by Class
Class 1 Count Value Class 4 Count Value
Minimum -32,767 to +32,766 Minimum -8,388,607 to +8,388,606
Maximum (Min. Value +1) to +32,767 Maximum (Min. Value +1) to +8,388,607