SmartAXIS Touch User’s Manual A-17
7 FBD Program
Appendix
● FBD Program Examples
Example program 1
For example, in the above FBD program, the program size and the number of used devices can be calculated as
described below.
Example program 2
For example, in the above FBD program, the program size and the number of used devices can be calculated as
described below.
Block number
FB Size (Qty of Bytes)
Number of Used devices
Block (B) Timer (T) Counter (C)
M8125 SM Special Internal Relay
Special internal relays, inputs, and outputs do not affect the FBD
program size or the number of used devices.
I1 I Input
Q0 Q Output
B1 WEEK Weekly Timer 24 (Number of tabs: 2) 1 0 0
T0 DTIM Dual Timer 12 0 3 0
B2 OR Logical OR 12 1 0 0
Total 48 (Program size) 2 3 0
Block number
FB Size (Qty of Bytes)
Number of Used devices
Block (B) Timer (T) Counter (C)
I1 I Input
Inputs, analog inputs, and internal relays do not affect the FBD
program size or the number of used devices.
I2 I Input
I3 I Input
I4 I Input
AI1 AI Analog Input
M0003 M Internal Relay
B1 AND Logical AND 12 1 0 0
B2 OR Logical OR 12 1 0 0
B3 STTG(I) Schmitt Trigger 20 1 0 0
C10 CNT(W) Counter 12 0 0 1
Total 56 (Program size) 3 0 1
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