Reset (RES)
This information applies to the
CompactLogix
5370, ControlLogix
5570, Compact GuardLogix
5370, GuardLogix
5570, Compact GuardLogix
5380, CompactLogix
5380, ControlLogix
5580, GuardLogix
5580, and ControlLogix 5590 controllers.The RES instruction resets a TIMER, COUNTER, or CONTROL structure.
Available Languages
Ladder Diagram
Function Block
This instruction is not available in function block.
Structured Text
This instruction is not available in 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.
Ladder Diagram
Operand | CompactLogix 5370, ControlLogix 5570, Compact
GuardLogix 5370, and GuardLogix 5570 controllers Data Type | CompactLogix 5380, ControlLogix 5580, Compact
GuardLogix 5380, GuardLogix 5580, and ControlLogix 5590 controllers Data Type | Format | Description |
Structure | TIMER CONTROL COUNTER | TIMER TIMER_T CONTROL COUNTER | Tag | Structure to reset |
Description
When true, the RES instruction clears these elements:
When using a RES instruction for a: | The instruction clears: |
TIMER | .ACC value to 0 control status bits to false |
TIMER_T | .ACC value to 0 control status bits to false |
COUNTER | .ACC value to 0 control status bits to false |
CONTROL | .POS value to 0 control status bits to false |
Affects Math Status Flags
No
Major/Minor Faults
None specific to this instruction. See Index through arrays for array-indexing faults.
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. Reset the specified structure. |
Postscan | N/A |
Example
Ladder Diagram
Reset Example
In the preceding example:
when limit_switch_8 is enabled, reset counter_4
when limit_switch_5 is enabled, reset Timer_1
when limit_switch_6 is enabled, reset control_1
when limit_switch_9 is enabled, reset timer_21
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