Rockwell-automation 1746-NI16V SLC 500 Analog Input Modules User Manua Uživatelský manuál stáhnout pdf (Strana 96)

Publication 1746-UM001A-US-P

7-18 Application Examples

Class 3 Example

The following ladder logic program configures all 16 channels of a

1747-NI16 analog input module. It then monitors the module status

information and uses the analog data from the 16 channels when

status for each channel is good. In Class 3 mode, the processor can

read/write up to 32 I/O words from the module. In this mode, the SLC

5/02 or later processor can configure all 16 channels with one COPY

instruction. In addition, one copy instruction can be used to

constantly monitor status and, at the same time, a second copy

instruction can be used to bring the analog data into the SLC

processor. The status data can then be used to qualify the ladder

rungs that use the analog data. This ensures that the data is not used if

configuration errors, open-circuit conditions, or over- and

under-voltage conditions exist.

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Rockwell-automation 1746-NI16V SLC 500 Analog Input Modules User Manua Uživatelský manuál Strana 96