GE 90-30/20/Micro manual Boolean Execution Speed, Instruction Sizes for 350 and 360 Series CPUs

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Instruction Sizes for 350 and 360 Series CPUs

Memory size is the number of bytes required by the instruction in a ladder diagram application program. 350 and 360 Series CPUs require three (3) bytes for most standard boolean functions— see Table A-2.

Table A-2. Instruction Sizes for 350 and 360 Series CPUs

Function	Size
No operation	1
Pop stack and AND to top	1
Pop stack and OR to top	1
Duplicate top of stack	1
Pop stack	1
Initial stack	1
Label	5
Jump	5
All other instructions	3
Function blocks—see Table A-1	–

Boolean Execution Speed

The execution times of coils and contacts are shown below. These times represent the time used for each coil or contact in your RLD program.

Table A-3. Boolean Execution Speeds

Model 350 and 360 Series	0.22 milliseconds per 1,000 boolean
	contacts/coils
Model 340/341	0.3 milliseconds per 1,000 boolean
	contacts/coils
Model 331	0.4 milliseconds per 1,000 boolean
	contacts/coils
Model 313/323	0.6 milliseconds per 1,000 boolean
	contacts/coils
Model 311	18.0 milliseconds per 1,000 boolean
	contacts/coils

A-10 Series 90-30/20/Micro Programmable Controllers Reference Manual–September 1998 GFK-0467K