[Cause]
This alarm occurs when there is no response from another controller. (s: controller name) This function does not communicate with controllers that have not been specified as counterparts for approach stop or approach wait. Therefore, this alarm also occurs if approach stop or approach wait targeting this controller has not been configured on the controller specified in the alarm.
• The severity of the alarm will change as conditions arise.
[Countermeasure]
Check the communication line wiring, address, host name, and network hub settings. Also configure approach stop or approach wait targeting this controller on the counterpart controller.