Example 3: Start "Node Guard" Monitoring - Festo CPX-FB14 Electronic Manual

A. Technical appendix
A.2.3 Example 3: Start "Node guard" monitoring
PLC/PC/IPC
Fig. A/3: Example 3, start "Node guard" monitoring (
en 0206NH
Festo P.BE-CPX-FB14-GB
Load first the indices 100C and 100D via SDO transfer (see
example 5). The "Node guard" monitoring of the CPX terminal
starts when the first "Node guard" telegram is received. This
telegram must be cyclically repeated within the timeout time.
Timeout time = Guard time · Life time factor
= Index 100C · Index 100D
If this time is exceeded, the valves/outputs will be switched
off or will assume the fail safe status.
Please note
The timeout monitoring in the CPX terminal is inactive until
the first "Node guard" telegram is received. Valves which
are switched on remain set even after loss of communica-
tion, bus interruption etc.
*)
701
Node guard response
701 :
05
(all values in hex)
*)
Remote request)
MS PS
NS PL
IO SF
M
A-5