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National Instruments Corporation
45
NI 9144 User Guide and Specifications
NI 9219 Example Command Words Sequence
Note
The order in which you send the commands is important.
Configuration 1: All Channels (ai0:ai3) for Voltage AI, ±15 Volt Range,
High Speed Mode (100 Hz Max Sample Rate):
(0x0F)
Quarter-Bridge
350
Ω
(0x10)
120
Ω
(0x11)
Half-Bridge
1 V/V
(0x13)
Full-Bridge
CJC
62.5 mV/V
(0x14)
7.8 mV/V
(0x17)
CJC range
Table 41.
NI 9219 Configuration 1: Command Bytes
Command Byte Value
Description
0x01
ADC Mode Configuration Byte – Channel 0
0x01
Data Byte
0x46
CRC value
0x1F
Mode/Range Configuration – Channel 0
0x01
Data Byte
0xC6
CRC value
0x04
Calibration Offset MSB – Channel 0
0x7F
Data Byte
0x54
CRC value
0x05
Calibration Offset Byte 2 – Channel 0
0xFF
Data Byte
0xB6
CRC value
0x06
Calibration Offset LSB – Channel 0
0x85
Data Byte
Table 40.
NI 9219 Mode and Range Type (Continued)
Configuration
Value
Mode
Range