National Instruments Deterministic Ethernet Expansion Chassis NI 9144 - Manual (Page 33)

© National Instruments Corporation 33 NI 9144 User Guide and Specifications
NI 9213 Conversion Speed Control
The NI 9213 converts at two pre-defined rates, as controlled by the speed
control field.
Note The conversion rate assumes that 18 channels are in the scan list.
NI 9213 Common Mode Error/Status
The error/status field is shown in Table 22.
NI 9213 Scan List
The scan list contains channels to convert, in order. The NI 9213 has
eighteen measurable channels:
• 0..15: Sixteen thermocouple channels (always measured in a ±78 mV
range)
• 16: One cold junction channel (always measured in a ±2.5 V range)
• 17: One auto zero channel (always measured in a ±78 mV range)
Table 21. NI 9213 Conversion Speed Control
Speed Control Meaning Conversion
2 (0x02) High-Accuracy 55 ms/channel (.99 s total)
15 (0x0F) High-Speed 740
μs/channel (13.32 ms total)
Table 22. NI 9213 Error Status Field
Bits Field
31:8 Reserved
7 OT Error:
1= Open thermocouple was detected on the
last channel that was acquired
6 CMV Error:
1= Common mode voltage error was
detected on the last channel that was
acquired
5 GO Status: status of the gain override enable
bit
4 Reserved
3:0 Currently configured ADC data rate