Measurement-computing CB-7000 Utilities Manual do Utilizador descarregar pdf (Página 28)

3.3

Module Watchdog

3.3.1 Introduction

The 7000 series modules are designed for industrial applications. They can b e used in an

electrically harsh environment. However, the module can go down if EMI or power supply noise

is too high.

The “$AA5” command is designed to detect the module hardware watchdog timeout. If a module

goes down, the module hardware watchdog circuit resets the module. The reset puts the output

state of module to its power-on value. The Power-On value may be different from the output-

value before module was reset. Therefore the user must send an output command again to return

to the original output state (or value) before module watchdog reset.

Figure 3-5. Module Watchdog Resets the Module

When the Module is Halted.

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Measurement-computing CB-7000 Utilities Manual do Utilizador Página 28