Recent posts to SMC_FB_WASNT_CALLED_DURING_MOTION when enable MC_MoveRelativehttps://forge.codesys.com/forge/talk/Motion/thread/6cb9a95ea2/2025-11-03T10:31:17.980000ZRecent posts to SMC_FB_WASNT_CALLED_DURING_MOTION when enable MC_MoveRelativeSMC_FB_WASNT_CALLED_DURING_MOTION when enable MC_MoveRelative2025-11-03T10:31:17.980000Z2025-11-03T10:31:17.980000Zgseidelhttps://forge.codesys.com/u/gseidel/https://forge.codesys.comf407e8812332b1b4f2331fa7c51353832bfcbd70<div class="markdown_content"><p>Hi ducng,</p>
<p>please make sure to call all Motion-FBs in the EtherCAT task. In your case, the PLC_PRG should be below the EtherCAT task, not the MainTask.</p>
<p>Best regards,</p>
<p>Georg</p></div>SMC_FB_WASNT_CALLED_DURING_MOTION when enable MC_MoveRelative2025-11-02T15:11:00.159000Z2025-11-02T15:11:00.159000Zducnghttps://forge.codesys.com/u/ducng/https://forge.codesys.com8613ad896f56f5347ea1e80a688b374b05bf57d4<div class="markdown_content"><p>Hello,<br/>
I am using an Inovance PLC to control a servo via EtherCAT. When I enable MC_POWER, the drive switches to Run mode successfully. After that I call MC_MoveRelative, but I get the error SMC_FB_WASNT_CALLED_DURING_MOTION. The servo vibrates but the motor shaft does not move.</p>
<p>I am new to EtherCAT/servo motion control, so I would appreciate any guidance or suggestions for troubleshooting this issue. Thank you in advance for your help.</p></div>