E-STOP RELAY FAILED TO RELEASE IN TIME 
"COMPARE THE TIME DELAY RELAY DURATION WITH THE SETTING IN THE PLC AND ADJUST IF NECESSARY. THE RELAY COULD BE BROKEN OR MALFUNCTIONING AND NEEDS TO BE REPLACED. WARNING: WHEN THE ""E-STOP SAFETY FAILED TO RELEASE"" FAULT IS ACTIVE THE POWER TO THE MACHINE IS STILL LIVE. USE EXTREME CAUTION WHEN WORKING ON OR AROUND THE MACHINE."