Ld, Ldi - Mitsubishi Electric FX3G SERIES Programming Manual

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
7.1

LD, LDI

Outline
LD and LDI instructions are contacts connected to bus lines.
When combined with ANB instruction described later, LD and LDI instructions can be used for the start of branches.
1. Instruction format
LD
Load
LDI
Load
Inverse
2. Applicable devices
Bit Devices
Instruc-
System User
tion
X Y M T C S D .b KnX KnY KnM KnS T C D R U \G
LD
1
LDI
1
1: Special auxiliary relays (M) and 32-bit counters (C) cannot be indexed with index registers (V and Z).
2: State relays (S) cannot be indexed with index registers (V and Z).
3: "D .b" is available only in FX
4: This function is supported only in FX
Explanation of function and operation
1. LD instruction (initial logical operation, NO contact type)
Circuit program
LD instruction
X000
Bus line
Timing chart
X000
Y000
Mnemonic
Basic Instruction
LD
−
Mnemonic
Basic Instruction
LDI
−
Digit Specification
3
1 2
3
1 2
and FX PLCs. However, index modifiers (V and Z) are not available.
3U 3UC
/FX
3U 3UC
List program
Y000
ON ON
ON ON
Operation Condition
Continuous
Operation
Pulse (Single)
Operation
Operation Condition
Continuous
Operation
Pulse (Single)
Operation
→ For the number of instruction steps, refer to Section 7.15.
Word Devices
Special
System User Index
Unit
V Z Modify K H
PLCs.
Connection to bus line
0000 LD X000
0001 OUT Y000
7 Basic Instruction
7.1 LD, LDI
Others
Con- Real Charac-
Pointer
stant Number ter String
E " "
4
4
181
1
2
3
4
5
P
6
7
8
9
10