Table of Contents
Advertisement
170 •
MODBUS Functions
Internal Variables
Set the watchdog for a timeout of 10 minutes. Function code 3 (Read Multiple
Registers) will be use to reset the watchdog time.
Register Adresse 0x100B
Value
Access
Default
Description
To stop the watchdog after it is started, write the value 0x0AA55 or
0X55AA into it the Simply Stop Watchdog register (0x1008).
1. Write 0x1770 (10*60*1000 ms / 100 ms) in the register for time overrun
(0x1000).
(3-1)
2. Write 0x0004 (2
3. Modify the value of the Watchdog-Trigger register (0x0003) to start the
watchdog.
4. At this point, the fieldbus master must continuously use function code 3
(Force Single Coil) within the specified time to reset the watchdog timer.
If time between requests exceeds 10 minutes, a watchdog timeout error
occurs..
To stop the watchdog after it is started, write the value 0x0AA55 or
0X55AA into it the Simply Stop Watchdog register (0x1008).
Save Watchdog Parameter
write
0x0000
With writing of '1' in register 0x100B
the registers 0x1000, 0x1001, 0x1002 are set on remanent.
) in the Coding Mask register (0x1001)
WAGO-I/O-SYSTEM 750
ETHERNET TCP/IP
Advertisement
Table of Contents
