346
FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
13 High Speed Processing – FNC 50 to FNC 59
13.7 FNC 56 – SPD / Speed Detection
13.7
FNC 56 – SPD / Speed Detection
Outline
This instruction counts the input pulse for a specified period of time as interrupt input.
The function of this instruction varies depending on the version.
1. Instruction format
2. Set data
3. Applicable devices
S
: X000 to X007 can be specified.
Operand Type
Description
Data Type
Device number of pulse input (X)
Bit
Time data (unit: ms) or word device number storing data
16- or 32-bit binary
Head word device number storing pulse density data
16- or 32-bit binary
Oper-
and
Type
Bit Devices
Word Devices
Others
System User
Digit Specification
System
User
Special
Unit
Index
Constant
Real
Number
Charac-
ter String
Pointer
X
Y
M T C S D
.b KnX KnY KnM KnS T C D R U
\G
V Z Modify
K
H
E
"
"
P
S
3
3
3
3
3
3 3 3 3
3
3 3
3
3
3
3 3 3 3
3 3
3
Mnemonic
Operation Condition
32-bit Instruction
13 steps
DSPD
Continuous
Operation
7 steps
SPD
Continuous
Operation
16-bit Instruction
Mnemonic
Operation Condition
FNC 56
SPD
D
S
1
S
2
D
S
1
S
2
D