Figure 113: State Diagram, Simple_Watchdog Operation Mode; Figure 114: State Diagram, Switching Operation Modes - WAGO 750-8207 Manual

310 MODBUS – e!RUNTIME

Figure 113: 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 114: State Diagram, Switching Operation Modes

Manual
Draft version 1.2.1 from 2017-09-13, valid from FW Version 02.06.20(09)
WAGO-I/O-SYSTEM 750
750-8207 PFC200 CS 2ETH RS 3G