Mitsubishi Electric MELSEC FX3U - FNC212 - POP; Shift Last Data Read [FILO Control]

680
FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
27 Data Operation 3 – FNC210 to FNC219
27.3 FNC212 – POP / Shift Last Data Read [FILO Control]
27.3 FNC212 – POP / Shift Last Data Read [FILO Control]
Outline
This instruction reads the last data written by shift write (SFWR) instruction for FILO control.
→ For SFWR (FNC 38) instruction, refer to Section 11.9.
1. Instruction format
2. Set data
3. Applicable devices
Explanation of function and operation
1. 16-bit operation (POP and POPP)
Data for FILO control
• Every time the instruction is executed for the word devices to +n-1, a device “ + Pointer
data ” is read to . (The last data entry written by the shift write (SFWR) instruction for first-in
first-out control is read to .) Specify “n” in the range from “2” to “512”.
Operand Type Description Data Type
Head device number storing first-in data (including pointer data)
16-bit binary
Device number storing last-out data
n
Length of data array
(Add "1" because pointer data is also included.)
2 ≤ n ≤ 512
Oper-
and
Type
Bit Devices Word Devices Others
System User Digit Specification System User
Special
Unit
Index
Con-
stant
Real
Number
Charac-
ter String
Pointer
XYMTCSD
 .b KnX KnY KnM KnS T C D R U\G VZModifyKH E "  "P
3 3 3 3333 3 3
3333333 3 333
n 33
Description
Pointer data (amount of data stored)
+1
Data area
(First-in data written by shift write (SFWR) instruction)
+2
+3
...
+n-3
+n-2
+n-1
Mnemonic Operation Condition
16-bit Instruction
7 steps
POP
POPP
Mnemonic Operation Condition
Continuous
Operation
Pulse (Single)
Operation
32-bit Instruction
⎯
⎯
P
FNC 212
POP
S
D
S
D
FNC212
POPP
S  D  n
Command
input
S
S
S
S
S
S
S
S S S
S D
D