Register 0X1101 - Watchdog Status; Register 0X1102 - Watchdog Timeout; Register 0X1103 - Watchdog Config; Table 212: Watchdog Status - WAGO 750-8207 Manual

WAGO-I/O-SYSTEM 750
750-8207 PFC200 CS 2ETH RS 3G
10.5.4.2 Register 0x1101 – Watchdog Status
This register provides the current state of the MODBUS watchdog.
The following states are possible:

Table 212: Watchdog Status

Value
0xFFFF
0x0000
0x0001
0x0002
10.5.4.3 Register 0x1102 – Watchdog Timeout
This register contains the value for the watchdog timeout. The step width is
100 ms and the maximum value is 65535 (corresponds to 6553.5 s). The default
value is 0. In this case the watchdog cannot be started and will have the
WATCHDOG_UNCONFIGURED state.
The register can be read and written in the states
WATCHDOG_UNCONFIGURED, WATCHDOG_STOPPED and
WATCHDOG_EXPIRED. However, if the watchdog is active
(WATCHDOG_RUNNING state), this register can only be read. The response to
a write operation is an ILLEGAL_FUNCTION (0x01) exception.
10.5.4.4 Register 0x1103 – Watchdog Config
This register contains the configuration parameters for the watchdog. The
register is organized in bits, see following table.
Draft version 1.2.1 from 2017-09-13, valid from FW Version 02.06.20(09)
Name
WATCHDOG_
UNCONFIGURED
WATCHDOG_
STOPPED
WATCHDOG_
RUNNING
WATCHDOG_
EXPIRED
MODBUS – CODESYS 2 299
Explanation
The MODBUS watchdog is not configured, the
"Watchdog Timeout" register (0x1102) contains
the value 0. This state can only be closed by
setting a timeout > 0.
The watchdog is configured, the "Watchdog
Timeout" register (0x1102) contains a value >0.
In the STANDARD_WATCHDOG operation
mode the watchdog can be activated in this
state by the WATCHDOG_START command.
This state cannot be reached in the
ALTERNATIVE_WATCHDOG operation mode
since the watchdog is started automatically
here.
The MODBUS watchdog is active, i.e.
configured and started. The set timeout has not
yet expired.
The timeout set in register 0x1102 (Watchdog
Timeout) has expired. In the
STANDARD_WATCHDOG operation mode, the
watchdog in this state must be reset to the
WATCHDOG_STOPPED state with the
WATCHDOG_RESET command. In the
ALTERNATIVE_WATCHDOG operation mode,
the watchdog is automatically restarted with the
next trigger.
Manual