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WAGO I/O SYSTEM 750 XTR
Modbus – e!RUNTIME 323
750-8202/040-000 PFC200 2ETH RS XTR
Manual
Version 1.2.0, valid from FW Version 03.01.07(13)
Figure 106: State Diagram, SIMPLE_WATCHDOG Operation Mode
The state diagram for the SIMPLE_WATCHDOG operation mode shows that the
watchdog is always active as soon as a timeout > 0 is set in the register 0xFA01
(Watchdog Timeout). The writing of commands in the register 0xFA00 (Watchdog
Command) is restricted in this operation mode. Only the WATCHDOG_START
command is permitted as a possible trigger. The only possibility to deactivate and
stop the watchdog in operation mode SIMPLE_WATCHDOG, is the switching
back to the operation mode ADVANCED_WATCHDOG.
The following diagram shows the possible state transitions when operation
modes are switched.
Figure 107: State Diagram, Switching Operation Modes