Pilz PNOZ m B0 - Manual (Page 36)

Communication modules
Operating Manual PNOZmulti 2 Communication Interfaces
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INFORMATION
If a fieldbus module is configured, virtual inputs cannot be activated via the
communication module.
5.7.3.1 Control Byte (Byte 40)
Bit 0 … 2 of the Control Byte contain a watchdog function.
If no virtual inputs are sent by a communications partner within the defined watchdog time
(watchdog timeout), the PNOZmulti 2 sets the virtual inputs to "0".
Control Byte 40:
Reserved Delayed
Re­
sponse
Error
Message Reserved Reserved W­Timer
Bit2
W­Timer
Bit1
W­Timer
Bit0
} Bit 0 ­ 2: Watchdog Timeout
Watchdog Timer
Bit 2
Watchdog Timer
Bit 1
Watchdog Timer
Bit 0 Watchdog Timeout
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
} Bit 3 and 4: Reserved
} Bit 5 Error Message: Error message
If the bit is set to "1", an error stack entry is generated when the watchdog is triggered.
} Bit 6 Delayed Response: Delayed response
If the bit is set to "1", the response (send virtual outputs) is sent after a delay of one
cycle.
} Bit 7: Reserved
INFORMATION
To test if the watchdog is active, set a virtual input continuously to "1".
If this input becomes "0" after the set watchdog timeout has elapsed, then
the watchdog is active.