Pilz PNOZ m B0 - Manual (Page 51)

Modbus/TCP
Operating Manual PNOZmulti 2 Communication Interfaces
1002971­EN­02 51
The table below describes the Modbus/TCP data areas for the watchdog.
A relevant area for the watchdog is defined in each Modbus/TCP data area (Coils (0x), Dis­
crete Inputs (1x), Input Register (3x), Holding Register (4x)). Read/write access will depend
on the Modbus/TCP data area.
Register
(3x, 4x)
Coil/
Discrete Input
(0x, 1x) Content High Byte Low Byte
255 4095...4080 Control Register See table below
High Byte WD­Trig­
ger
Error Mes­
sage Reserved Reserved Reserved W­Timer
Bit 2
W­Timer
Bit 1
W­Timer
Bit 0
Low Byte Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved
Bit 15 "Watchdog Trigger": The watchdog can be triggered by setting Bit 15 constantly to
"1", or by a Client writing in the input area of the 128 inputs. The state of the bit when read­
ing is undefined. A 1 or a 0 can be read.
Bit 14 "Error Message": If this bit is set, an error stack entry is generated when the watch­
dog is triggered.
Bit 10 … 8 "WD Timer": If the set time for the watchdog is set, then Bit 15 must be set, or
become set, at the same time.
Watchdog Timer
Bit 2
Watchdog Timer
Bit 1
Watchdog Timer
Bit 0 Watchdog Time
0 0 0 Timer deactivated
0 0 1 100 ms
0 1 0 200 ms
0 1 1 500 ms
1 0 0 1 s
1 0 1 3 s
1 1 0 5 s
1 1 1 10 s
INFORMATION
To check whether the watchdog has been triggered, set a virtual input per­
manently to "1".
If the corresponding input in the PNOZmulti 2 is "0", then the watchdog has
been triggered.