Indexing In Applied Instructions - Mitsubishi Electric FX3G SERIES Programming Manual

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
5.7.2

Indexing in applied instructions

Expression of applied instructions allowing indexing
In the explanation of applied instructions, " " is added to the source
operands allowing indexing as shown in the figure below so that such operands can be discriminated from operands
not allowing indexing.
FNC 12
MOV
In the case of bit devices
The indexing operation is explained in an example in which the
comparison result M0 in CMP (FNC 10) instruction is indexed with the
index register V1 (as shown in the figure on the right).
Transfer K0 or K10 to the index register V1 in advance.
When X001 is set to ON, "M(0+0) = M0" and the comparison result is
output to M0 to M2 if V1 is "0".
On the other hand, "M(0+10) = M10" and the comparison result is output
to M10 to M12 if V1 is "10".
• The index registers Z0 to Z7 and V0 to V7 can be used for indexing.
In the case of word devices
1. indexing operands in 16-bit instructions
The indexing operation is explained in an example in which the transfer
destination D0 in MOV instruction is indexed with the index register V3 (as
shown in the figure on the right).
Transfer K0 or K10 to the index register V3 in advance.
When X001 is set to ON, "D(0+0) = D0" if V3 is "0", and K500 is
transferred to D0.
When X001 is set to ON, "D(0+10) = D10" if V3 is "10", and K500 is
transferred to D10.
2. indexing operands in 32-bit instructions
In a 32-bit instruction, it is also necessary to specify a 32-bit index register
in the instruction.
When an index register Z (Z0 to Z7) is specified in a 32-bit instruction, the
specified Z and its counterpart V (V0 to V7) work together as 32-bit
registers.
The indexing operation is explained in an example in which the transfer
destinations [D1, D0] in DMOV instruction are indexed with the index
registers [V4, Z4] (as shown in the figure on the right).
Transfer K0 or K10 to the index registers [V4, Z4] in advance.
When X003 is set to ON, "[D(1+0), D(0+0)] = [D1, D0]" if [V4, Z4] is "0",
and K69000 is transferred to [D1, D0].
When X003 is set to ON, "[D(1+10), D(0+10)] = [D11, D10]" if [V4, Z4] is
"10", and K69000 is transferred to [D11, D10].
160
Indicates that indexing is allowed.
S D
K100 D 10
5 How to Specify Devices and Constants to Instructions
S or destination
X000
FNC 12
MOVP
X000
FNC 12
MOVP
X001
FNC 10
CMP
V1=0
D0>D1 → M0=ON M10=ON
D0=D1 → M1=ON M11=ON
D0<D1 → M2=ON M12=ON
X000
FNC 12
X000
FNC 12
X001
FNC 12
V3=0 : K500 → D0 (D0+0)
V3=10 : K500 → D10 (D0+10)
X002
FNC 12
DMOVP
X002
FNC 12
DMOVP
X003
FNC 12
DMOVP
V4,Z4=0 : K69000 → D1 ,D0 (D0+0)
V4,Z4=10 : K69000 → D11,D10 (D0+10)
5.7 Indexing
D symbol to indicate
K0 V1
K0 → V1
K10 V1
K10 → V1
D0 D1 M0V1
V1=10
K0 V3
MOVP
K0 → V3
K10 V3
MOVP
K10 → V3
K500 D0V3
MOV
K0 Z4
K0 → V4,Z4
K10 Z4
K10 → V4,Z4
K69000 D0Z4