Table 202: Watchdog Commands - WAGO I/O SYSTEM 750 Manual

WAGO-I/O-SYSTEM 750
750-8208 PFC200 CS 2ETH RS CAN DPM

Table 202: Watchdog Commands

Value
0x5555
0x55AA
0xAAAA WATCHDOG_
Manual
Version 1.1.0, valid from FW Version 02.06.20(09)
Name
WATCHDOG_
START
WATCHDOG_
STOP
RESET
MODBUS – CODESYS 2
Explanation
Starts the configured watchdog;
in the WATCHDOG_UNCONFIGURED state
if no timeout is configured, the response is an
ILLEGAL_DATA_VALUE (0x03) exception.
In the WATCHDOG_EXPIRED state and the
STANDARD_WATCHDOG operation mode
the response is an ILLEGAL_FUNCTION
(0x01) exception. The watchdog must in this
case be reset first with the command
WATCHDOG_RESET to the
WATCHDOG_STOPPED state. In all other
cases the watchdog is restarted and the
WATCHDOG_RUNNING state is set.
Stops the running watchdog;
in the WATCHDOG_UNCONFIGURED state,
the response is an ILLEGAL_DATA_
VALUE (0x03) exception if no timeout time is
set. In the WATCHDOG_EXPIRED state and
the STANDARD_WATCHDOG operation
mode the response is an ILLEGAL_FUNCTION
(0x01) exception. In this case the watchdog
must first be reset with the WATCHDOG_
RESET command to the WATCHDOG_
STOPPED state. In operation mode
ALTERNATIVE_WATCHDOG the response is
an ILLEGAL_DATA_
VALUE (0x03) exception. The command is not
generally permitted in this operation mode. In
all other cases, the watchdog is stopped
successfully and the WATCHDOG_
STOPPED state is set. In the
WATCHDOG_STOPPED state, a stop
command received several times in a row does
not have any impact on the behavior of the
watchdog and is therefore not acknowledged
with an error response.
Resets the expired watchdog;
the watchdog is reset in the
WATCHDOG_EXPIRED state and
STANDARD_WATCHDOG operation mode.
The watchdog is then in the
WATCHDOG_STOPPED state. In all other
cases the response is an ILLEGAL_
DATA_VALUE (0x03) exception.
283