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How do I read the status bits on the HI 1756WS?

Last updated 10/12/2015 04:47 AM

Question

How do I read the status bits on the HI 1756WS?

Answer

If you set up the module in the PLC I/O table as a generic module:
Since the data passed from the HI 1756 module to the PLC is in REAL format, you cannot monitor the bits directly. The way to read the status bits on the HI 1756WS is to copy the STATUSWORD into a DINT location, then you can monitor the individual bits.   Once you have the bits copied into a DINT location, keep in mind that the least significant 16 bits are for channel 0 (scale 1) and the most significant 16 bits are used for channel 1 (scale 2) if it is a dual scale module.  Single scale modules do not use the most significant 16 bits of the STATUSWORD.

If you set up the module in the PLC I/O table using the Add on Profile:
The STATUSWORD for each of the channels will be found in the input table designated as STATUSWORD.  This will be in the correct format to allow the user to use the individual bits.  The bits for the different channels are also separated for each of the channel tags.