Rockwell-automation 1746-NI16V SLC 500 Analog Input Modules User Manua User Manual download pdf (Page 69)

Publication 1746-UM001A-US-P

Channel Configuration, Data, and Status 5-21

Calibrate Channel Status (Bits 9 through 7)

The calibrate channel status bits indicate the completion of the

calibration process. The code of (0 0 0) indicates that the channel is in

the normal run mode or this code can be used to exit the calibration

mode. If bit 7 is set to 1, the channel is in the calibration mode. If bit

8 is set to 1, the channel has successfully calibrated the zero reference

point. If bit 9 is set to 1, the channel has successfully calibrated the

full-scale reference point.

For more information on the calibration procedure, see Appendix D.

Class 1 Handshaking (Bit 6)

Bit 6 is only necessary when in Class 1 mode. Class 3 does not need

bit 6 for configuration. While in Class 1, bit 6 is 0, signifying that the

channel is ready to receive configuration information. After processing

configuration information for that channel bit 6 is set to 1. Bit 6 must

cleared (0) to complete the handshaking cycle.

Class 3 Data Format (Bits 6 through 4)

The data format bit field indicates the data format defined for the

channel. This field reflects the data format selected in the channel

configuration word. The data format field is cleared when the channel

is disabled. In Class 3, an extra bit (bit 6) is allotted to indicate which

user limit range (0, 1, 2 or 3) was selected.

Class 1 Data Format (Bits 5 and 4)

The data format bit field indicates the data format defined for the

channel. This field reflects the data format selected in the channel

configuration word. The data format field is cleared when the channel

is disabled. In Class 1, only 2 bits describe the data format because

user limits ranges are not selectable in Class 1.

1 2 ... 64 65 66 67 68 69 70 71 72 73 74 ... 119 120

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Rockwell-automation 1746-NI16V SLC 500 Analog Input Modules User Manua User Manual Page 69