Spectrum-controls 1746sc-NI8u Manuel d'utilisateur télécharger pdf (Page 66)

54 SLC 500

™

Universal Analog Input Module

Figure 5.5 Data table for dynamic programming

address 15 data 0 address 15 data 0

N10:0 1000 0011 0101 0011 N10:8 1000 0000 0111 1111

N10:1 1000 0011 0101 0011

N10:2 1000 0011 0101 0011

N10:3 1000 0011 0101 0011

N10:4 1000 0011 0101 0011

N10:5 1000 0011 0101 0011

N10:6 1000 0011 0101 0011

N10:7 1000 0011 0101 0011

Important: While the module performs the configuration alteration, it

does not monitor input device data change at any channel.

Verifying Channel

Configuration

Changes

When executing a dynamic channel configuration change, there will

always be a delay from the time the ladder program makes the change

to the time the NI8u gives you a data word using that new configuration

information. Therefore, it is very important to verify that a dynamic

channel configuration change took effect in the module, particularly if

the channel being dynamically configured is used for control. The

following example explains how to verify that channel configuration

changes have taken effect.

Example - Execute a dynamic configuration change to channel 2 of the

universal module located in slot 3 of a 1746 chassis, and set an internal

“data valid” bit when the new configuration has taken effect. In this

example the input image of the channel is selected to contain the

channel status word.

1 2 ... 61 62 63 64 65 66 67 68 69 70 71 ... 129 130

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Spectrum-controls 1746sc-NI8u Manuel d'utilisateur Page 66