The Analog tab contains a series of predefined diagnostic values for the "Slave diagnostics" module:

Counter slave resets

Shows how often the connection between the master and the monitored slave has been terminated and reestablished.

Voltage difference between High and Low level measured between B and A

In the device, there is a transducer, that allows you to measure the voltage difference between line B and line A for the slave which is being monitored. For detailed information about measuring the voltage, see chapter Display of bus voltages in the I/O Manager.

Timeout

Timeout parameter which has been detected for the slave that is being monitored.

Various telegram counters

There are counters for the different telegram types.