It does, starting with version 2.02. An audible alarm sounds on the PC as a communication error. You are notified of the break when the ACK (Acknowledge of Device Communication Interference) icon blinks, and by the communication status icon on the project list screen. Also, you can check the status in the Log Dialog Box. For details, see sections 6.6.2, 6.6.4, and 6.10 in the user's manual (IM 04L65B01-01EN).
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