WAGO-I/O-SYSTEM 750 MODBUS – CODESYS 2 281
750-8208 PFC200 CS 2ETH RS CAN DPM
Manual
Version 1.1.0, valid from FW Version 02.06.20(09)
Figure 108: State Diagram, ALTERNATIVE_WATCHDOG Operation Mode
The state diagram for the ALTERNATIVE_WATCHDOG operation mode shows
that the watchdog is always active as soon as a timeout time > 0 is set in the
register 0x1102 (Watchdog Timeout). The writing of commands in the register
0x1100 (Watchdog Command) is limited in this operation mode. Only the
WATCHDOG_START command is permitted as a possible trigger. The only
possibilities to deactivate or stop the watchdog in
ALTERNATIVE_WATCHDOG mode are the setting of the timeout register to 0
after the timeout has elapsed and the switching back to the
STANDARD_WATCHDOG operation mode.
The following diagram shows the possible state transitions when operation modes
are switched.
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