Measurement Computing CB-7000 Utilities - Manual (Page 25)

21
Figure 3-1. Host PC Periodically Sends Command “~**”
If the “~**” command does not reach the modules, every Host Watchdog sets modules to Safe
States (Figure 3-2).
Figure 3-2. Command “~**” Does Not Reach Modules;
All output command are ignored after the Host Watchdog sets the module to go to a safe state.
The Host PC m ust use the ~AA0 command to r ead the module status, and ~AA1 to clear the
module status (Figure 5-3).
Figure 3-3. All Output Commands Are Ignored Until ~AA1 Clears
The flow chart for the host computer is given in Figure 3-4.