Instruction manual
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2 SYSTEM CONFIGURATION 
(b) Motion SFC performance specifications 
Item Q173DSCPU/Q172DSCPU Q173DCPU(-S1)/Q172DCPU(-S1)
Motion SFC program 
capacity 
Code total 
(Motion SFC chart + Operation control + 
Transition) 
652k bytes  543k bytes 
Text total 
(Operation control + Transition) 
668k bytes  484k bytes 
Motion SFC program 
Number of Motion SFC programs  256 (No.0 to 255) 
Motion SFC chart size/program  Up to 64k bytes (Included Motion SFC chart comments) 
Number of Motion SFC steps/program  Up to 4094 steps 
Number of selective branches/branch  255 
Number of parallel branches/branch  255 
Parallel branch nesting  Up to 4 levels 
Operation control 
program 
(F/FS) 
 / 
Transition program 
(G) 
Number of operation control programs 
4096 with F(Once execution type) and FS(Scan execution type) 
combined. (F/FS0 to F/FS4095) 
Number of transition programs  4096(G0 to G4095) 
Code size/program  Up to approx. 64k bytes (32766 steps) 
Number of blocks(line)/program  Up to 8192 blocks (in the case of 4 steps(min)/blocks) 
Number of characters/block  Up to 128 (comment included) 
Number of operand/block  Up to 64 (operand: constants, word device, bit devices) 
( ) nesting/block  Up to 32 levels 
Descriptive
expression 
Operation control 
program 
Calculation expression, 
bit conditional expression, 
branch/repetition processing 
Calculation expression, 
bit conditional expression 
Transition program 
Calculation expression/bit conditional expression/ 
comparison conditional expression 
Execute specification 
Number of multi execute programs  Up to 256 
Number of multi active steps  Up to 256 steps/all programs 
Executed 
task 
Normal task  Execute in main cycle of Motion CPU 
Event task 
(Execution 
can be 
masked.) 
Fixed cycle 
Execute in fixed cycle 
(0.22ms, 0.44ms, 0.88ms, 1.77ms, 
3.55ms, 7.11ms, 14.2ms) 
Execute in fixed cycle 
(0.44ms, 0.88ms, 1.77ms, 3.55ms, 
7.11ms, 14.2ms) 
External interrupt Execute when input ON is set among interrupt module QI60 (16 points).
PLC interrupt  Execute with interrupt instruction (D(P).GINT) from PLC CPU. 
NMI task  Execute when input ON is set among interrupt module QI60 (16 points).
Number of I/O points (X/Y)  8192 points 
Number of real I/O points (PX/PY) 
256 points 
(Built-in interface in Motion CPU 
(Input 4 points) + I/O module + 
Intelligent function module) 
256 points 
(I/O module) 










