Rockwell-automation DeviceLogix System User Manual Manual de usuario Pagina 35
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Publication RA-UM003B-EN-P - February 2010 35
Navigate the Function Block Editor Interface Chapter 2
High/Low Limit
The DeviceLogix High/Low Limit function block limits the input value
within the specified data range.The High/Low Limit function block is
outlined in detail below.
IF value of Input > HighLimit
Output = HighLimit
ELSE IF value of Input < LowLimit
Output = LowLimit
ELSE
Output = Input
END
The valid data ranges are as follows.
IMPORTANT
When data values are large, switching between REAL and DINT
data types may cause a minimal loss of accuracy. For example,
a value of 99999999 DINT will be rounded up to 100000000
REAL when you switch to a REAL data type and then back to a
DINT data type.
Condition
Output
Fault Status
If Use Fault Checking
is RESET
If Use Fault
Checking is SET
INPUT in NAN NAN Value of the Fault
state value
1
INPUT is the Positive
Infinity
HighLimit 0
INPUT is the Negative
Infinity
LowLimit 0
Parameters Data Range
HighLimit 2147483648 ~ 2147483647 (DINT)
-3.402823466e+38F ~ 3.402823466e+38F (REAL)
LowLimit 2147483648 ~ 2147483647 (DINT)
-3.402823466e+38F ~ 3.402823466e+38F (REAL)
FaultOption 0, 1, 2, 3, 4, 5
FaultStateValue -2147483648 ~ 2147483647 (DINT)
-3.402823466e+38F ~ 3.402823466e+38F (REAL)
Note: HighLimit > LowLimit.
- DeviceLogix System 1
- Important User Information 2
- Summary of Changes 3
- Table of Contents 5
- Interface 6
- Create Logic in the Old 6
- DeviceLogix Ladder Editor 6
- Register EDS Files and Add 8
- Devices Offline/Online 8
- RSNetWorx for DeviceNet 8
- Software and the 8
- Purpose of This Manual 9
- Who Should Use 9
- This Manual 9
- Related Terms 9
- Common Techniques Used 10
- Introduction 11
- Inputs and Outputs 12
- Local Function Block Logic 13
- DeviceLogix Functionality 14
- Software 14
- DeviceLogix Operating Modes 15
- Launch the DeviceLogix 16
- DeviceLogix Function 20
- Block Elements 20
- I/O Components 21
- Analog Input Point (AIP) 22
- Analog Output Point (AOP) 22
- Function Block Instructions 23
- Parameters Data Range 26
- MinTime 0 ~ 65535 26
- RangeTime 0 ~ 65535 26
- ElapsedTime 0 ~ 65535 26
- Δt is Loop Update Time 27
- Filter Category 32
- Select/Limit Category 34
- Statistical Category 36
- Timer/Counter Category 37
- PRE 0 ~ 65535 38
- ACC 0 ~ 65535 38
- Time Base 0 (1 ms), 1 (10 ms) 38
- Compare Category 44
- Compute/Math Category 46
- Move/Logical Category 48
- Boolean Functions 49
- Enable Line Feature 50
- Tabbed Instruction Toolbars 53
- Process Category Toolbar 54
- Filter Category Toolbar 54
- Select/Limit Category Toolbar 54
- Statistical Category Toolbar 54
- Compare Category Toolbar 55
- Compute/Math Category Toolbar 56
- Move/Logical Category Toolbar 57
- Schematic View 59
- Bind Function Blocks with I/O 67
- Overview of Inputs and 68
- Connect I/O points and 69
- Determine the status of a 70
- Set Assume Data Available 71
- General tab 72
- Parameters tab 73
- Offline Operations 83
- Forcing 91
- Forcing Inputs 92
- Forcing Outputs 92
- Rung Element 97
- Bit Element 98
- Latch Element 98
- Set Dominant Latch 99
- Reset Dominant Latch 99
- Counter Element 100
- Down Counter 101
- Timer Element 102
- On Delay Timer 104
- Off Delay Timer 105
- Configuration Toolbars 106
- Ladder Element Toolbars 107
- Latch Element Toolbar 108
- Counter Element Toolbar 108
- Online Toolbar 109
- Ladder Logic View 110
- Message Pane 110
- Status Bar 111
- File Menu 112
- Edit Menu 112
- View Menu 113
- Communication Menu 114
- Tools Menu 115
- Help Menu 116
- Ladder Editor 117
- Online Operations 118
- Go On Line 119
- Online Animation 120
- Change Logic 120
- Enable and Disable Logic 121
- Verify Logic 122
- Compare Logic 123
- Upload and Download Logic 123
- Clear Latched Hardware Faults 126
- Recovery Mode 126
- What This Chapter Contains 127
- Components 127
- Ladder Elements 128
- Standard Toolbar 130
- Tabbed Instruction Toolbar 130
- Bit Element Toolbar 131
- Process Element Toolbar 131
- Filter Element Toolbar 132
- Select/Limit Element Toolbar 132
- Statistical Element Toolbar 132
- Compare Element Toolbar 133
- Status Bar 135
- Communications Menu 140
- About I/O Tags 143
- Working with the Tag Database 144
- About Screen Format 145
- Elements 145
- Configure the Macro 146
- Instruction 146
- Create the Macro Definition 148
- Add Parameters 150
- Set Macro Security 150
- IMPORTANT 151
- Apply the Macro Definition 152
- Manage the Macro 154
- Force Inputs and Outputs 162
- Force I/O in the Tag Database 163
- Offline/Online 165
- 3. Click Next to start 166
- 11. Click Next 168
- Register EDS Files 170
- 5. Click Next 171
- 8. Click Next 171
- 13. Click Next 173
- 14. Click Finish 173
- Add Devices offline 174
- Add Devices online 174
- DeviceLogix Editors 177
- Check General Information 178
- Check Revision Field 179
- Using Window Buttons 179
- Enter Device Parameters 180
- Device Parameter Controls 181
- Select Group Parameters 183
- Restore Default Values 183
- Understand Parameters 184
- Determine Parameters 188
- Access I/O Data Information 195
- Access EDS Information 196
- Launch the DeviceLogix Editor 198
- Rockwell Automation Support 208
- Documentation Feedback 208
- User Manua 209
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