Utility
Watchdog v2
Description To use this function block, connect a parameter in a remote device to the 'Network Input' parameter (do NOT connect a local parameter). The timer is reset whenever a non-zero value is received. If the remote device fails or is powered down or if the network fails, the timer will timeout and the 'Status' output will go true.
Availability
  • Available only in the dw2xx series products
  • Requires library: System & I/O
  • Singleton function block
  • Firmware versions 0x201F and later
savvy-SFD Graphic watchdog2
Graphic with Parameters watchdog2

Parameters

Network Input Input, Read-only, Placeholder (signed 16-bit integer)

Incoming connection should NOT be from a local parameter.
Timer Internal Parameter, Read-only, Analog (unsigned 16-bit integer)
0.00 s to 600.00 s
0 = Timed Out
Initial Holdoff Internal Parameter, Read-write, Analog (unsigned 16-bit integer)
0.01 s to 600.00 s
Timeout Internal Parameter, Read-write, Analog (unsigned 16-bit integer)
0.01 s to 600.00 s
Fault Output Output, Read-only, Boolean (signed 16-bit integer)
0 = Fault
1 = OK
Network Driver Output, Read-only, Enumerated (signed 16-bit integer)
-1 = Fault
1 = OK
2 = OK
PLX Driver Output, Read-only, Analog (signed 16-bit integer)
1 to 30000

Connect to 787)driveweb Watchdog Timer
0 = Fault
Fault Input Input, Read-write, Boolean (signed 16-bit integer)
0 = Fault
1 = OK
Propagate To Network Input, Read-write, Boolean (signed 16-bit integer)
0 = Enable
1 = Disable
Propagate To PLX Internal Parameter, Read-write, Boolean (signed 16-bit integer)
0 = Disable
1 = Enable
Fault on Ethernet Down Internal Parameter, Read-write, Boolean (signed 16-bit integer)
0 = Disable
1 = Enable
Fault on Device Comms Fail Internal Parameter, Read-write, Boolean (signed 16-bit integer)
0 = Disable
1 = Enable
PLX Trip Time Internal Parameter, Read-write, Analog (signed 16-bit integer)
5 ms to 150000 ms

(assumes a PLX timebase of 5ms)
Status Internal Parameter, Read-only, Enumerated (signed 16-bit integer)
-1 = Initial Holdoff
0 = OK
1 = Fault from Network
2 = Timeout
3 = Fault Input
4 = Network Down
5 = Device Comms Fail