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FIFR(P)
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7.7 Data Table Operation Instructions
7.7.2 Reading oldest data from tables (FIFR(P))
7.7.2 Reading oldest data from tables (FIFR(P))
FIFR(P)
Function
(1) Stores the oldest data ( +1) input to the table designated by at the device designated by
.
After the execution of the FIFR instruction, the data in the table is all compressed up by one
block.
(2) Users should attempt to avoid executing the FIFR instruction if the value stored at is 0.
[See Program Example (1)]
Operation Error
(1) In any of the following cases, an operation error occurs, the error flag (SM0) turns ON, and
an error code is stored into SD0.
• The FIFR instruction was executed when the value at was 0. (Error code: 4100)
• The data table range exceeded the corresponding device range at execution of the FIFR
instruction. (Error code: 4101)
: Head number of the devices where the data read from the table will be stored (BIN 16 bits)
: Head number of the table (BIN 16 bits)
Setting
Data
Internal Devices
R, ZR
J\
U\G
Zn Constants Other
Bit Word Bit Word
––
–– –– ––
Basic
Process
High
performance
Redundant
Universal
Command
Command
FIFRP
FIFR
S
S
FIFR
FIFRP
D
D
S
D
S
D
D D
S
+1
+2
Data table
Number of stored
data blocks
5432
1234
3
0
0
+3
4321
Stores 0.
+4
+1
+2
Data table
1234
4321
2
0
0
+3
0
5432
+4
D
D
D
D
D
D
D
D
D
D
S
D
D