Fnc291 - Saver / Save To Er - Mitsubishi Electric FX3G SERIES Programming Manual

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
33.2 FNC291 – SAVER / Save to ER
Outline
This instruction writes the current values of the extension registers (R) stored in the PLC's built-in RAM to extension
file registers (ER) stored in a memory cassette (flash memory) in sector units (2048 points).
The RWER (FNC294) instruction provided in FX
arbitrary number of points. It is not necessary to execute the INITR (FNC292) or the INITER (FNC295) instruction
when RWER instruction is used.
1. Instruction format
FNC 291
SAVER
2. Set data
Operand Type
S
n
D
3. Applicable devices
Bit Devices
Oper-
and System User
Type
X Y M T C S D .b KnX KnY KnM KnS
S
n
D
Explanation of function and operation
1. 16-bit operation (SAVER)
The contents (current values) of extension registers (R) specified by
extension file registers (ER) inside a memory cassette (flash memory) with the same device numbers in "2048/n"
operation cycles ("2048/n+1" cycles if there is a remainder).
While the instruction is being executed, the number of points already written is stored in
Command
input
Instruction execution complete flag
M8029
Extension registers (R)
inside built-in RAM
S
+1
S
S +2
+2047
S
*1 "n" points are written (transferred) in each operation cycle.
716
Mnemonic
16-bit Instruction
SAVER
7 steps
⎯
Head device number of extension register sector to which data is to be written
(Only the head device number of a sector of extension registers can be specified.)
Number of points written (transferred) in one operation cycle [0 ≤ n ≤ 2048]
Device number storing the number of already written points
Digit Specification
FNC291
S n
SAVER
*1
Write
(transfer)
33 Extension File Register Control – FNC290 to FNC299
PLCs Ver.1.30 or later and FX
3UC
→ For RWER instruction, refer to Section 33.5.
Operation Condition
32-bit Instruction
Continuous
Operation
Description
Word Devices
Special
System User
Unit
T C D R U \G
S
D
Instruction execution complete
M
flag for SAVER instruction
Extension file registers (ER)
inside memory cassette
S
E
E +1
S
E S +2
E +2047
S
33.2 FNC291 – SAVER / Save to ER
PLCs only writes (transfers) a
3U
Mnemonic Operation Condition
⎯
⎯
Others
Con- Real
Index
stant Number
V Z Modify K H E
to S +2047 are written (transferred) to
D .
Data Type
16-bit binary
Charac-
Pointer
ter String
" " P