A conditional command is useful when the same value does not need to be written to the end device continuously, but rather on change.  A conditional write command is scanned based upon its poll rate (like all other commands).  The... Read More

To view the floating-point value, the two 16-bit integers must be copied to a floating-point variable in the processor. For PLC and SLC processor, a COP command is used, with the source being the first integer value location, the dest being the F... Read More

A negative thirty six (-36) error code is generated when we have successfully connected to a device and issued the device a Modbus request, but it has not responded to the request within the defined response time out period. This is akin to calling... Read More

In some of our older Modbus products we had/have a feature called float flag. This feature, which has been renamed to Enron-Daniels mode in most of our newer Modbus products to avoid the misconception that this mode was necessary for accessing... Read More