If the F7490 Siemens drive fault cannot be cleared by troubleshooting and resetting the drive, it may be necessary to repair or replace the drive. Here are some options:
If you have searched for "f7490 siemens drive fault," you are likely staring at a red LED on your operator panel or a cryptic line in your PLC diagnostics. This article provides an exhaustive breakdown of what F7490 means, why it occurs, how to safely troubleshoot it, and how to prevent it from recurring. f7490 siemens drive fault
: Activating a safety function (like STO or SS1) during motion will immediately withdraw the EPOS enable signal, resulting in this fault. If the F7490 Siemens drive fault cannot be
The primary cause of F7490 is the removal of the enable signals while the drive is active. This typically places the drive in a "switching on inhibited" state. Common triggers include: Withdrawal of Enable Signals : Loss of signals such as OFF1, OFF2, OFF3 Enable Operation during a move. Secondary Fault Triggering : Activating a safety function (like STO or
: Loss of the "Master control by PLC" signal or fieldbus communication interruptions can also lead to an immediate shutdown. Step-by-Step Troubleshooting Guide Fault 7490 on Sinamics S120 - SiePortal - Siemens
If the F7490 Siemens drive fault cannot be cleared by troubleshooting and resetting the drive, it may be necessary to repair or replace the drive. Here are some options:
If you have searched for "f7490 siemens drive fault," you are likely staring at a red LED on your operator panel or a cryptic line in your PLC diagnostics. This article provides an exhaustive breakdown of what F7490 means, why it occurs, how to safely troubleshoot it, and how to prevent it from recurring.
: Activating a safety function (like STO or SS1) during motion will immediately withdraw the EPOS enable signal, resulting in this fault.
The primary cause of F7490 is the removal of the enable signals while the drive is active. This typically places the drive in a "switching on inhibited" state. Common triggers include: Withdrawal of Enable Signals : Loss of signals such as OFF1, OFF2, OFF3 Enable Operation during a move. Secondary Fault Triggering
: Loss of the "Master control by PLC" signal or fieldbus communication interruptions can also lead to an immediate shutdown. Step-by-Step Troubleshooting Guide Fault 7490 on Sinamics S120 - SiePortal - Siemens