Baumer BA_DSRT_22DJ - Handbuch (Seite 53)

Manual_CANopen_StrainLink_EN_V3_05.doc 53/65 Baumer
22.07.11/dam Frauenfeld, Switzerland
7.4 Heartbeat
The CANopen strain link offers the option of the heartbeat protocol. The Heartbeat protocol makes an error
control system possible without an interrogation being necessary. The Heartbeat producer transmits the
status message cyclically (defined in object 1017h). If the message does not arrive within the defined time,
the CAN bus controller can send a corresponding reaction (Network management commands).
The heartbeat time can be adjusted between 1 and 65535 (1ms up to 65.535 seconds).
7.4.1 Producer heartbeat time
Read producer heartbeat time (object 1017h):
ID DLC Byte1 Byte2 Byte3 Byte4 Byte5 Byte6 Byte7 Byte8
600h + ID 8 40h 17h 10h 00h 0 0 0 0
Response from CANopen strain link:
ID DLC Byte1 Byte2 Byte3 Byte4 Byte5 Byte6 Byte7 Byte8
580h + ID 8 4Bh 17h 10h 00h 00h 00h 0 0
Byte 5 + 6:
00’00h 00’00h (LSB first) disabled (Default value)
Change producer heartbeat time to 1000ms (1000d
3E8h):
ID DLC Byte1 Byte2 Byte3 Byte4 Byte5 Byte6 Byte7 Byte8
600h + ID 8 22h 17h 10h 00h E8h 03h 0 0
Byte 5 + 6:
E8’03h 03’E8h (LSB first) 1000d 1000ms
Response from CANopen strain link:
ID DLC Byte1 Byte2 Byte3 Byte4 Byte5 Byte6 Byte7 Byte8
580h + ID 8 60h 17h 10h 00h 0 0 0 0
If this time is set to 0 no Heartbeat protocol takes place (default value).
The value can be stored in the EEPROM with the object 1010h.
After the heartbeat protocol is activated, the sensor sends the following messages:
ID DLC Byte1
700h + ID 1 04h
Byte 1:
00h boot up
04h stop mode
05h operate
7Fh pre-operational