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168 •
MODBUS Functions
Internal Variables
Register address 0x1002 (MODBUS Address 404099)
Designation
Access
Default
Description
Register address 0x1003 (MODBUS Address 404100)
Designation
Access
Default
Description
Register address 0x1004 (MODBUS Address 404101)
Designation
Access
Default
Description
Register address 0x1005 (MODBUS Address 404102)
Designation
Access
Default
Description
Register address 0x1006 (MODBUS Address 404103)
Designation
Access
Default
Description
Watchdog function coding mask, function code 17...32, WD_FCM_17_32
read / write
0x0000
Same function as above, however, with the function codes 17 to 32. These
codes are currently not supported, for this reason the default value should not
be changed.. It is not possible to modify this value while the watchdog is
running.
Watchdog-Trigger, WD_TRIGGER
read / write
0x0000
This register is used to trigger the watchdog. The default value after power up
is 0. The writing of a non zero value will trigger the watchdog. The
watchdog is triggered each time the contents of this register are modified.
The watchdog cannot be triggered if the watchdog timer register is set to 0.
Minimum current trigger time, WD_AC_TRG_TIME
read / write
0xFFFF
This register stores the time value for the shortest remaining watchdog
duration. The default value is 0xFFFF. When the watchdog timer is
triggered, this register is continuously compared to the remaining watchdog
time, and the lesser of the two values is stored in this register. If the value in
this register is 0, a watchdog fault has occured.
Watchdog stoppen, WD_AC_STOP_MASK
read / write
0x0000
This register is used to stop the watchdog timer by entering a value of
0xAAAA followed by 0x5555.
While watchdog is running, WD_RUNNING
read
0x0000
Current watchdog status.
at 0x0000: Watchdog not active,
at 0x0001: Watchdog active.
at 0x0002: Watchdog exhausted.
WAGO-I/O-SYSTEM 750
ETHERNET TCP/IP
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