WAGO-I/O-SYSTEM 750
Fieldbus Communication 251
750-882 Media Redundancy ETHERNET Controller
Manual
1.5.0
Table 136: Register Address 0x1006
Register address 0x1006 (4102
dez
)
Value
While watchdog is running, WD_RUNNING
Access
Read
Standard
0x0000
Description
Current watchdog status.
at 0x0000: Watchdog not active
at 0x0001: Watchdog active
at 0x0002: Watchdog exhausted.
Table 137: Register Address 0x1007
Register address 0x1007 (4103
dez
)
Value
Restart watchdog, WD_RESTART
Access
Read/write
Standard
0x0000
Description
This register restarts the watchdog timer by writing a value of 0x1 into it.
If the watchdog was stopped before the overrun, it is not restarted.
Table 138: Register Address 0x1008
Register address 0x1008 (4104
dez
)
Value
Simply stop watchdog, WD_AC_STOP_SIMPLE
Access
Read/write
Standard
0x0000
Description
This register stops the watchdog by writing the value 0xAA55 or 0x55AA into it.
The watchdog timeout fault is deactivated and it is possible to write in the
watchdog register again. If there is an existing watchdog fault, it is reset
Table 139: Register Address 0x1009
Register address 0x1009 (4105
dez
)
Value
Close MODBUS socket after watchdog timeout
Access
Read/write
Description
0: MODBUS socket is not closed
1: MODBUS socket is closed
Table 140: Register Address 0x100A
Register address 0x100A (4106
dez
)
Value
Alternative watchdog
Access
Read/write
Standard
0x0000
Description
This register provides an alternate way to activate the watchdog timer.
Procedure: Write a time value in register 0x1000; then write a 0x0001 into
register 0x100A. With the first MODBUS request, the watchdog is started. The
watchdog timer is reset with each MODBUS/TCP instruction. If the watchdog
times out, all outputs are set to zero. The outputs will become operational again,
after communications are re-established.
Register 0x00A is non-volatile, including register 0x1000.
It is not possible to modify the time value in register 0x1000 while the watchdog is
running.
