E-32Â Safety EDM / Channel fault in Toshiba drive
E-32 Safety EDM / Channel Error fault in Toshiba drive
Description Relating to the "Safe Torque Off" (STO) system. While E-30 indicates the inputs are open, E-32 (on AS3/G9 models) often refers to an "External Device Monitor" (EDM) mismatch or channel discrepancy. The drive monitors the feedback from the safety channels. If Channel A opens but Channel B stays closed for more than 1 second, E-32 locks the drive to prevent unsafe operation. Causes
1. Wiring Discrepancy: One safety wire is loose, causing intermittent contact on only one channel.
2. Relay Failure: The external safety relay (e.g., Pilz or Rockwell) has a welded contact on one pole.
3. EDM Feedback: If using the EDM output to monitor the drive, the external safety controller might have detected a fault and cut one channel. Solution This fault is a "Latching" safety fault. It cannot be reset by just pressing Stop/Reset. You usually have to cycle main power.
Inspect the safety inputs (S1, S2 or STO+, STO-). Both must toggle simultaneously. Connect a multimeter to the terminals. Trigger the E-stop. Both channels should drop to 0V instantly. If one hangs at 24V, you have a short or a stuck relay. Fix the external wiring to ensure simultaneity.
Description Relating to the "Safe Torque Off" (STO) system. While E-30 indicates the inputs are open, E-32 (on AS3/G9 models) often refers to an "External Device Monitor" (EDM) mismatch or channel discrepancy. The drive monitors the feedback from the safety channels. If Channel A opens but Channel B stays closed for more than 1 second, E-32 locks the drive to prevent unsafe operation. Causes
1. Wiring Discrepancy: One safety wire is loose, causing intermittent contact on only one channel.
2. Relay Failure: The external safety relay (e.g., Pilz or Rockwell) has a welded contact on one pole.
3. EDM Feedback: If using the EDM output to monitor the drive, the external safety controller might have detected a fault and cut one channel. Solution This fault is a "Latching" safety fault. It cannot be reset by just pressing Stop/Reset. You usually have to cycle main power.
Inspect the safety inputs (S1, S2 or STO+, STO-). Both must toggle simultaneously. Connect a multimeter to the terminals. Trigger the E-stop. Both channels should drop to 0V instantly. If one hangs at 24V, you have a short or a stuck relay. Fix the external wiring to ensure simultaneity.
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