What to do if Siemens LOGO! CIM Control Unit CIM cannot send or receive SMS?
- YytaylorAug 4, 2025
If your Siemens Control Unit CIM cannot send or receive SMS messages, here are a few possible reasons and solutions: * Your SIM card account might be in arrears. Top up the account and restart the cellular module on the Cellular status page. * The SIM card might be locked by your telecom provider. Contact them to unlock it. * The SMSC number might be incorrect. Ask your telecom provider for the correct SMSC number and enter it in the web-based configuration under Cellular Settings -> SMS Center Number. * The SIM card might not be compatible with the cellular module. Try a different SIM card that is compatible.