When the delay after shear and other delay features were added we had larger operating system timer times and the limits on the length of the delay were smaller.

On closed loops with 1 msec operating system timer times and 64 second delay times , the size of the integer variables use to store and measure the delay times became unable to store the values and significant information was lost when delays became larger than 32 seconds, resulting in much shorter than expected delay times.

This has now been resolved.

SCN 4552 did not completely fix the issues with long Delay After Shear times. The bug was due to a missing edit. Longer delays were possible but due to the missing edit they were not accurate.

MRS discovered an issue one their machines with the Item Complete output on an E-Stop. After a reset of the E-Stop circuit, the Item Complete output would turn back ON.

They requested that we add an E-Stop input to all of their models and that it terminate the Item Complete timer early. They have been assuming that all XL controllers had an E-Stop input and have wired all of their machines this way.

Only Closed Loop controllers have an E-Stop input. Since our controller is not a safety rated device we are uncomfortable adding a new input to a controller with the name E-Stop to avoid potentially invalid assumptions about the purpose of that input.

A new input will be added to all XL Open Loop models that have an input available. It will be added based on DIP switch selection to avoid impacting legacy installations. The new input will be called "Sys. Ready". If the Sys Ready input is configured it will terminate the Item Complete timer if the input turns off. If configured, the input will also be required to enter the run mode and will also terminate any run mode in progress.

On Closed Loop models, losing the E-Stop input will terminate the Item Complete Timer.

The DIP switch configuration and the input location of the Sys Ready input will be defined in the Switch and IO documents for each controller model.