Table 211: Watchdog Commands - WAGO 750-8207 Manual

298 MODBUS – CODESYS 2

Table 211: Watchdog Commands

Value
0x5555
0x55AA
0xAAAA
Manual
Draft version 1.2.1 from 2017-09-13, valid from FW Version 02.06.20(09)
Name
WATCHDOG_
START
WATCHDOG_
STOP
WATCHDOG_
RESET
750-8207 PFC200 CS 2ETH RS 3G
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.
WAGO-I/O-SYSTEM 750