Rockwell Automation 1747-PT1, D1747NP002 Hand-Held Terminal - Manual (Page 463)

Instruction Execution Times
Appendix C
Memory Usage,
C–9
Instructions Having Indexed Addresses
For each operand having an indexed address, add 50 microseconds to the
execution time for a true instruction. For example, if a MOV instruction has
an indexed address for both the source and destination, the execution time
when the instruction is true is 24 + 50 + 50 = 124 microseconds.
Instructions Having M0 or M1 Data File Addresses
For each bit or word instruction, add 1928 microseconds to the execution
time. For each multiple-word instruction, add 1583 microseconds plus 667
microseconds per word.
]/[
M1:3.1
1
] [
M0:2.1
1
( )
M0:2.1
10
MOV
MOVE
Source
M1:10.7
Dest N7:10
Example
COP
COPY FILE
Source
#B3:0
Dest #M0:1.0
Length 34
For the multi–word instruction above, add 1583 microseconds plus 667
microseconds per word. In this example, 34 words are copied from #B3:0 to
M0:1.0. Add 1583 + (667 x 34) = 24261 microseconds to the execution time
listed on page C–8. This comes to 763 (calculated from page C–8 table) plus
24261 = 25024 microseconds total, or 25.0 milliseconds.