Jetter JC-120MC, User Manual

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Jetter AG 527
JC-120MC Programming
To launch heartbeat monitoring, proceed as follows:
Step Action
1
Enable heartbeat monitoring:
Enter the timeout value into the corresponding register. This value
must range between 1 and 65535 [ms]. Example:
For CAN 0 and node ID 1: Enter a timeout value of 3000 [ms] into
register 400229.
2
Define in your application program how the device is to respond to
individual values in the heartbeat status register.
When the state in register 40x101 ... 40x227 changes, the value in
register 40x100 changes to 1 (true).
3 Reset the value in register 40x100 to zero (false).
This step ensures that subsequent changes in register 40x101 ...
40x227 can be displayed.
Heartbeat monitoring starts on receipt of the first heartbeat (including bootup
message). The DLC (Data Length Code) of the heartbeat message must be 1.
To terminate heartbeat monitoring, proceed as follows:
Step Action
1 Disable heartbeat monitoring:
Enter a timeout value of 0 [ms] into the timeout register.
When a heartbeat timeout is detected, an emergency message is sent
automatically.
On receipt of the next heartbeat message, the emergency message is reset.
Example:
The following emergency message is tripped:
Reference Value
Error code 0x8130
Error Register 0x81
Manufacturer error 0x00,NodeID,0x00,0x00,0x00
The message on the CAN bus looks as shown below:

Own NodeID 5
 Monitored NodeID 1
 ID: 0x85 DLC = 8 Data: 0x30 0x81 0x81 0x00 0x01 0x00 0x00 0x00
Launching heartbeat
monitoring
Terminating heartbeat
monitoring
Emergency message