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API Command Reference
Appendix A
A-32 NetScan User’s Manual
L
- Set Trigger Level
TYPE
Channel
EXECUTION
Deferred
SYNTAX
Lchan,
level,
hyst
Sets the level against which the testing of channel readings should be
performed where
chan
is the channel number such that
1
<
chan
<
max
,
where
max
=
128
for NetScan.
level
is the level against which the readings are tested to determine if the
level has been exceeded.
hyst
is the hysteresis level.
L?
Query the the current level settings
DESCRIPTION
The Set Trigger Level (
L
) command simply sets the level against which the testing of channel readings should be
performed. The Set Trigger Configuration (
T
) command should be used to configure whether the level condition
should be tested for going above the specified level or below the specified level.
Note: This command is only valid for trigger start/stop events of
T4
and
T5
.
The parameter
level
is the value, which, if exceeded (by going above or below it as defined), should generate
a trigger event. The parameter
hyst
is the hysteresis value that, with
level
, is used to test whether the level
condition still persists. The level condition will persist until the channel readings no longer exceed the level as
specified. Further, in order to come out of the level condition, the channel readings must not exceed the
aggregate of the level and hysteresis values. The format for the
level
and
hyst
arguments follow the rules
for readings input defined under the Set Data Format (
F
) Command and in the
Data Format
section of
Appendix D
.
EXAMPLE
PRINT#1, “F0,0X”
‘ Set the engineering units format to be degrees C
PRINT#1, “L1,100.0,10.0X”
‘ Set the level channel to be channel 1 at a level 100.0
°
C with a hysteresis of 10.0
°
C
PRINT#1, “L?X”
‘ Read the current level setting
LINE INPUT#1, L$
PRINT L$
‘ The screen shows
L001,+0100.0,+0010.0
PRINT#1, “T4,5,0,0X”
‘ Set the unit to start on channel going above the level
and to stop on the channel going below the level
- OMB-NETSCAN 1
- OMEGAnet 2
- On-Line Service 2
- Internet e-mail 2
- How To Use This Manual 3
- Table of Contents 4
- 6 Calibration 5
- 7 Hardware Setup 5
- Inspect Your System 7
- Check and Install Hardware 8
- Setup for Ethernet Operation 10
- NetScan and TCP/IP Addressing 14
- Protocol 14
- IP Address 14
- Sub-net Mask 14
- Gateway Address 14
- Configuration 15
- Connect Channel Signal Inputs 16
- DB50 Pin Descriptions 17
- Overview 19
- ChartViewNET, Basic Concepts 19
- Chartvw.cvw 20
- ChartViewNET Quick Start 21
- 1. Select Interface Device 24
- 2. Configure Chart Setup 25
- ChartView Toolbar Reference 27
- 4. Configure Acquisition 28
- 5. Review Configuration 29
- 8. Start Charts 30
- A Note In Closing 30
- General Description 31
- Operational Aspects 32
- Software and Hardware 33
- NetScan Specifications 33
- Channels 34
- Triggers 35
- Data Storage & Format 35
- Calibration 37
- Three Ways of Using ChartView 40
- 1) Waiting for Trigger 41
- Main Window 42
- Channel Information Region 44
- Status Indicator Region 45
- Main Window Toolbar 46
- Adding Channel 2 to Chart 1 48
- Adding a Chart to Group 1 51
- PostView post-acq data viewer 53
- Arm Acquisition 53
- Disarm 53
- Main Window Pull-Down Menus 54
- File Menu Note 55
- Link to Excel… 59
- Upload Data 59
- Acquisition 59
- Stop Upload 59
- Setup IEEE 488 61
- RS-232/422 61
- … Status 62
- Instrument Error 64
- Instrument 64
- Realtime Clock 64
- Bar Graph Meters 66
- Analog Meters 67
- Digital Meters 68
- Meter Toolbars 69
- Meter Pull-Down Menus 69
- Meters Configuration Menu 70
- Configuring a Meter 70
- Setup Window 71
- Acquisition Setup Dialog Box 74
- Acquisition Setup 76
- Data Destination Dialog Box 77
- Chart Setup Wizard 79
- PostView 83
- Introduction 84
- Starting PostView 85
- PostView Toolbar Items 86
- Menu Items 88
- Automatic Display Creation 90
- Display Configuration 91
- Editing a Display 92
- PostView 5-11 93
- Manually Creating a Display 94
- PostView Timebase 97
- Calibration 6 99
- &$87,21 100
- Hardware Protected RAM 100
- ScanCal Software Application 101
- Using ScanCal 102
- Interface Parameters 102
- Calibration Without ScanCal 103
- Calibration of Main Unit 104
- Gain Calibration of Main Unit 106
- Offset Calibration of Cards 108
- Cold Junction Calibration 115
- Hardware 7 119
- Rear Panel 120
- Power Aspects 121
- Memory Configuration 122
- Serial Port Pin Connectors 126
- (RS-232) 127
- (RS-422) 127
- Digital I/O Lines 128
- External TTL BNC Connectors 129
- Signal Conditioning Cards 129
- CSN14/TC/P 130
- CSN14/LV/ (T, B, & S) 132
- CSN14/HV/S 133
- CSN/Relay Card 134
- CSN/Relay Card Specifications 135
- 7-18 NetScan User’s Manual 136
- Automatic Channel Assignment 137
- Appendices 139
- A-ii NetScan User’s Manual 140
- API Commands 141
- Command Syntax 142
- Command Interpretation 143
- Command Summary 146
- Command Reference 150
- - Trigger On Command 151
- - Power-On Reset 154
- - Power-Up Settings 154
- - Time Stamping 155
- - Assign Alarm Output 156
- - Alarm Stamping 157
- - Configure Channels 158
- - Select Card 160
- - Set Relay Make Time 161
- - End Calibration Mode 161
- - Error Status Query 162
- - Set Data Format 163
- - Calibrate Channel Gain 166
- - Set Scan Interval 168
- - Digital Input Stamping 169
- - Enter Calibration Mode 171
- - Set Trigger Level 172
- - Set Measuring Mode 173
- - Set Event Mask 174
- - Set Digital Outputs 175
- - Program Trigger Times 176
- - Query 177
- - Set Query Terminator 178
- - Query Card Data 180
- - Read Buffered Data 181
- - Read Last Readings 182
- - Set Real Time Clock 182
- - User Status 185
- - Set User Terminator 189
- - Set Average Weight 189
- - Execute 190
- API Command Reference 192
- Appendix A 192
- A-52 NetScan User’s Manual 192
- Ethernet API Reference 193
- Appendix C 197
- Contents 197
- Memory Allocation 198
- Measuring Modes 199
- Normal Mode 200
- Configuration Requirements 202
- Channel Configuration 203
- Scan Configuration 205
- Acquisition Configuration 206
- Pre-Trigger State 207
- C-12 NetScan User’s Manual 208
- Trigger and Stop Events 209
- C-14 NetScan User’s Manual 210
- Time Stamping ( 211
- Alarm Stamping ( 211
- Digital Input Stamping ( 212
- With Digital Input Stamping: 213
- Also see Digital Input ( 213
- ) command in Appendix A 213
- Trigger Block Organization 214
- NetScan User’s Manual C-19 215
- Multiple Trigger Blocks 216
- NetScan User’s Manual C-21 217
- C-22 NetScan User’s Manual 218
- NetScan User’s Manual C-23 219
- C-24 NetScan User’s Manual 220
- Configuring Alarms 222
- Set Point Hysteresis 223
- Digital I/O Operation 224
- Appendix D 225
- HLL Register Contents 226
- Accessing HLL Registers 226
- Example 1: 227
- Example 2: 227
- Example 3: 228
- Example 4: 228
- Example 5: 228
- Data Format 229
- Data Output Formats 230
- Engineering Units Data Format 230
- Binary Data Format 232
- Counts Data Format 232
- Configuring Power-Up State 233
- Query (?) Commands 234
- U Status Commands 234
- Theory of Operation 236
- NetScan User’s Manual D-13 237
- Event Status Register 238
- Event Status Enable Register 238
- Status Byte Register 239
- Trigger Latency 241
- Trigger Overrun 241
- Buffer Overrun 241
- Real Time Clock 242
- NetScan Program Examples 243
- Appendix E 244
- E-2 NetScan User’s Manual 244
- ASCII Code Summary 245
- ASCII Code Details 247
- Appendix F 248
- F-4 NetScan User’s Manual 248
- NetScan Error Messages 249
- Appendix G 250
- G-2 NetScan User’s Manual 250
- Abbreviations 251
- Appendix H 252
- H-2 NetScan User’s Manual 252
- NetScan User’s Manual 254
- WARRANTY/DISCLAIMER 255
- RETURN REQUESTS/INQUIRIES 255
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