Safety circuit warning

What does SA mean?

This warning is displayed when a condition is detected in the internal safety circuit of the FR-A800/A800 Plus Series drive. It often indicates that the safety inputs (S1, S2) are not in the expected ON state for operation, or there's an internal fault, which leads to output shutoff (Safe state).

• Safety input terminals S1 or S2 are OFF when they should be ON to enable operation.
• Fault in the internal safety circuit of the drive, even if S1 and S2 are commanded ON.
• Incorrect wiring of the safety input terminals S1, S2, PC, SIC, SD, or an open circuit in the safety chain.
• External shorting wires for the safety function are not correctly installed or are loose (refer to page 60).
• Discrepancy in the state of S1 and S2 (e.g., one ON, one OFF) detected by the safety circuit.

Click steps to track your progress.

1. 1

   Verify the status of safety input terminals S1 and S2. Ensure they are correctly driven to the ON state (closed circuit) when drive operation is desired.

2. 2

   If the safety stop function is not utilized, confirm that terminals S1 and PC, S2 and PC, and SIC and SD are properly shorted with the factory-provided shorting wires (as per page 60).

3. 3

   Inspect all wiring associated with the safety circuit inputs (S1, S2, PC, SIC, SD) for loose connections, damage, or open circuits.

4. 4

   Check for any external safety devices (e.g., emergency stop buttons, safety gates) connected to S1 and S2, and confirm their proper operation and status.

5. 5

   If 'SA' is displayed along with 'E.SAF' (Safety circuit fault), prioritize troubleshooting 'E.SAF' as the underlying fault. If only 'SA' is present, it indicates an operational state of the safety inputs requiring attention.