JUMO 902910 CANtrans T RTD Temperature Probe with CANopen Output Operating Instructions - Manual (Page 20)

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5 CANopen function
5.7 Heartbeat
The Heartbeat object signals the presence of a transmitter, thereby ensuring
system reliability. It provides a simple alternative to the Node Guarding proto-
col (see chapter 5.8 “Node Guarding”, page 21).
Heartbeat
user data The heartbeat message (heartbeat event) consists of one byte. In this byte, the
NMT status of the internal status machine is coded as follows:
Bootup: 0
Stopped: 4
Operational: 5
Preoperational: 127
Settings for
heartbeat The configuration as a heartbeat sender takes place via the heartbeat produ-
cer time in the object dictionary (0x1017).
The Heartbeat and Node Guarding functions can only be activated one at a
time, but never simultaneously.
Factory setting: heartbeat switched off (= 0).
Heartbeat timer Setting the object
0x1017
milliseconds 0 — 65535
0 = inactive