Mitsubishi Electric 800 Series Instruction Manual page 43

• Safety fault buffer
Used to transmit fault detail codes from a device to the master.
The inverter status is stored as a fault detail code in the safety fault buffer.
Up to eight E.SAF fault detail codes which occurred after the power is turned ON are stored. When the ninth fault occurs, the
eighth fault is overwritten by the new data.
PNU60047 is used to read fault detail codes, and PNU60044 is used to read the number of times the buffer is changed after
the power is turned ON.
When a fault message is transmit to the safety fault buffer, it is transmitted to the master via S_ZSW2 (bit 7) and cleared after
the master recognizes the fault (bit 7 of S_STW2 is cleared).
6. Safety Communication Functions
6.2 PROFIsafe
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