Execution Times with Indirect Addressing
1
19
S7-400 Instruction List
A5E00267845-01
Execution Times with Indirect Addressing
1
When using indirect addresses statement consists of two parts:
Part 1: Load the address of the instruction
Part 2: Execute the instruction
In other words, when working with indirect addresses, you must calculate the execution time of an instruction from these two parts.
Calculating the Execution Time
The total execution time is calculated as follows:
Time required for loading the address
+
execution time of the instruction
=
Total execution time of the instruction
The execution times listed in the chapter entitled “List of Instructions” apply to the execution times of the second part of an instruction, i.e.
for the actual execution of an instruction.
You must then add the time required for loading the address of the instruction to this execution time (see following Table).
