1769-if8

Does anyone have sample program for setting up the ControlLogix 1769-IF8?

KWatkins said:

Does anyone have sample program for setting up the ControlLogix 1769-IF8?

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Which processor are you using the module with?

And a link to the manual if you don't already have it.

http://literature.rockwellautomation.com/idc/groups/literature/documents/um/1769-um002_-en-p.pdf

I am using the 1769-l32e

There's a Module Profile for the 1769-IF8 module in RSLogix 5000 v16 and later.

You don't need to "program" the module, just set up its configuration settings in the configuration applet.

Are you using an older version of RSLogix 5000, or have you somehow not installed the Module Profile for this module ?

I haven't found where you can do the scaling in the module config. Am I missing something? Can the scaling be done in the module configuration or do you have to do it in the program?

You're not missing anything, Jim. The original poster asked how to "set up" the module, which I interpreted as configuring the voltage or current range, the filters, and the alarms.

The 1769-series modules do not have some of the features of 1756-series modules, including onboard scaling to engineering units, or rate alarms.

The 1769-series modules are most similar to their SLC-500 counterparts, with scaling options limited to Raw, Engineering Units, Scaled to PID, and Percentage. "Engineering Units", in this context, really means "measurement units" because it outputs a value that corresponds to Volts or Milliamperes (i.e. 4000 for 4 mA, 20,000 for 20 mA).

The 1769-IF8 only recently got a good I/O profile in RSLogix 5000. There are Knowledgebase documents that describe how to run the module using Generic configurations, such as Answer ID # 28460.

Scaling the input data into true Engineering Units, like Feet Per Second, Gallons Per Hour, or Furlongs per Fortnight requires some controller logic. Use the SCL instruction in Function Block language, or do a simple linear equation in Relay Ladder Logic.