Rockwell Automation 1746-HSCE2 Multi-Channel High Speed Counter Module - Manual (Page 94)

Publication 1746-UM002B-EN-P - August 2004
6-2 Application Examples
Example 1 - Direct
Addressing This example sets up the module to count the number of pulses from
a high-speed device and apply that information to your ladder
program. The module is in Class 1, mode 3, with 4 counters available.
Ladder File 8 - HSCE2
0000
S:1
15
U
B3:0
0
U
B3:0
1
MOV
Move
Source
0
0 <
Dest
N11:0
140<
MOV
Fill File
Source
0
Dest
Length 8
#O:1.0
FLL
MUL
Multiply
Source A
10
10 <
Source B
N11:2
14 <
Dest
N11:1
140<
MUL
0001
S:1
15
B3:0
0
B3:0
1
JSR
Jump To Subroutine
SBR File Number
U:9
JSR
0002
RET
Return
RET
0003 END
FIRST_PASS
FIRST_PASS HSCE2_INIT_DONE
HSCE2_INIT_DONE
HSCE2_ERROR
HSCE2_ERROR
DATA_BLOCK_OFFSET
MAX_BLOCK_ADDR
Prior to use, the programmer sets N11:2 to the total number of data blocks which will be entered into file N10 (not including the Counter Control
Block), adds one rung for each configuration block (including the Counter Control Block), and initializes the data blocks in file N10. Ten integer data
blocks are used (instead of eight) to simplify the display in data windows. Note: The Counter Control Block rung differs from the other rungs
because the Counter Control Block does not require hand-shaking.
The first pass of the program initializes the following values:
1. The HSCE2 initialization done bit (B3/0) is unlatched.
2. The HSCE2 error bit (B3/1) is cleared.
3. The Counter Configuration Data Block is cleared. Note: The init HSCE2 routine (ladder file 9) is bypassed during the first pass to ensure the
Configuration Data Block is reset prior to transfer of the first configuration block
4. The transfer data block offset (N11:0) is cleared; i.e. the first
data block starts at offset 0 in N10 file.
5. Max data block address (N11:0) is calculated as: Total Data Blocks (N11:2) x 10 words/data block.
If the HSCE2 initialization is not done, and the HSCE2 has not errored, call the HSCE2
initialization routine.