Move (MOVE)
This table lists the controllers and applications that support this instruction.
Architecture | Standard applications | Safety applications |
|---|---|---|
CompactLogix 5370, ControlLogix 5570, Compact GuardLogix 5370, and GuardLogix 5570 controllers | Yes | No |
CompactLogix 5380, CompactLogix 5480, ControlLogix 5580, Compact GuardLogix 5380, and GuardLogix 5580 controllers | Yes | Yes |
The MOVE instruction moves a copy of the Source to the Dest. The Source remains unchanged.
TIP:
In Logix Designer version 36, the mnemonic for this instruction changed from MOV to MOVE.
Available Languages
Ladder Diagram
Function Block
This instruction is not available in function block.
Structured Text
This instruction is not available in structured text.
TIP:
Use an assignment ":=" with an expression to achieve the same result. Refer to Structured Text Syntax for more information on the syntax of expressions and assignments within structured text.
Operands
IMPORTANT:
Unexpected operation may occur if:
- Output tag operands are overwritten.
- Members of a structure operand are overwritten.
- Except when specified, structure operands are shared by multiple instructions.
There are data conversion rules for mixing numeric data types within an instruction. See Data Conversions.
Ladder Diagram
Numeric
Operand | Data Type CompactLogix 5370, ControlLogix 5570, Compact GuardLogix 5370, and GuardLogix 5570 controllers | Data Type CompactLogix 5380, CompactLogix 5480, ControlLogix 5580, Compact GuardLogix 5380, and GuardLogix 5580 controllers | Format | Description |
|---|---|---|---|---|
Source | SINT INT DINT REAL | SINT INT DINT LINT USINT UINT UDINT ULINT REAL LREAL TIME TIME32 LTIME DT LDT | immediate tag | Value to move |
Dest | SINT INT DINT REAL | SINT INT DINT LINT USINT UINT UDINT ULINT REAL LREAL TIME TIME32 LTIME DT LDT | tag | Tag to store the result |
TIP:
See Time and date data types for a complete description of Relative Time (LTIME, TIME, and TIME32) and Absolute Time (LDT and DT) data types.
TIP:
Keep these restrictions in mind when using Relative Time (LTIME, TIME, TIME32) and Absolute Time (LDT, DT) data types:
- A relative time type can move only to or from another relative time type.
- And absolute time type can move only to or from another absolute time type. Additionally, you can program an absolute time type with a LINT to accommodate some legacy timestamp practices.
String (for CompactLogix 5380, CompactLogix 5480, ControlLogix 5580, Compact GuardLogix 5380, and GuardLogix 5580 controllers only)
Operand | Data Type | Format | Description |
|---|---|---|---|
Source | String type | immediate tag | String to move |
Dest | String type | tag | Tag to store the result |
Affects Math Status Flags
Controllers | Affects Math Status Flags |
|---|---|
CompactLogix 5380, CompactLogix 5480, ControlLogix 5580, Compact GuardLogix 5380, and GuardLogix 5580 controllers | Conditional |
CompactLogix 5370, ControlLogix 5570, Compact GuardLogix 5370, and GuardLogix 5570 controllers | Yes |
See Math Status Flags.
Major/Minor Faults
A minor fault will occur if: | Fault type | Fault code |
|---|---|---|
Overflow detection feature is enabled and the Source value is outside the range of Dest type. | 4 | 4 |
Execution
Ladder Diagram
Condition/State | Action Taken |
|---|---|
Prescan | N/A |
Rung-condition-in is false | Set Rung-condition-out to Rung-condition-in. |
Rung-condition-in is true | Set Rung-condition-out to Rung-condition-in. The instruction copies the Source into the Dest. String operands: If Source.LEN > SIZE( Dest.DATA) The string is truncated to what will fit
S:V is set. |
Postscan | N/A |
Examples
Ladder Diagram
Structured Text
value_2 := value_1;
value_3 := 'Test PASSED';
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