Status of the communication between the environment monitoring unit and the device.
The environmental condition can be tested only when the communication is normal.
Options:
1.normal(1) - indicates that communication state is normal
2.shutdown(2) - indicates that communication state is shutdown
3.fault(3) - indicates that communication state is fault
4.abnormal(4) - indicates that communication state is abnormal
5.config(5) - indicates that communication state is config