SCN 4435 added the ability for a PLC to control when the shear fires on a Stopping Shear line. The XL lets the PLC know when the shear has fired and it has 500msec to acknowledge that is has seen it or this Stopping Shear Handshake Timeout error will occur. However, it should not occur if the feature is not enabled. There was a bug that caused the error to occur even when the feature was disabled. This has been resolved.