Instruction FALS(07) generates the code of fatal error that took place. In this case the following happens:1. Program stops and all outputs are shut down.2. Indicator ERR/ALM is turned on.3. Two-digit BCD number (01 do 99) of instruction FALS is written from SR 253000 to SR25307.4. If memory card with RTC is used, part of the memory where the presence of error is recorded will also contain numbers of FALS instruction and exact time when error took place.Numbers of FALS instruction can be assigned to certain states. Same number must not be assigned to both FAL and FALS instructions. To delete FALS error, PLC controller must be in PROGRAM mode, cause of error solved and then error code deleted.