CANopen Communication Module DVPCOPM-SL (2) Relevant parameter settings Error Control Protocol: In the “Node Configuration…” page, click on “Error Control Protocol”, and you will see the dialog box appearing as below. In this page, you can set up parameters for error control, e.g. “Master Consumer Timeout” and “Node Heartbeat Producer Time”. Please note that the value of “Master Consumer Timeout" shall be bigger than the value of “Node Heartbeat Producer Time”. After you have set up the heartbeat function, and the slave turns off-line and does not turn on-line within “Master Consumer Timeout”, the master will consider the slave off-line.
If “Heartbeat" is selected, you cannot select “Node Guarding”. In “Heartbeat consumer”, you can add devices into the node list. Add a device A, and the slave will be able to monitor whether device A is on-line. Select a device and click on “Edit…” to modify the “Consumer" and “Producer” value. Explanation of Parameters for above table is as below. DVP-PLC Operation Manual 19 Parameter Name Explanation Remark Node Guarding Guard time Master sends the guard message to slave in cycle of “Guard Time”. When “Heartbeat” is selected, “Node Guarding” can not be selected. Life Time Factor Life time=Guard Time x Life Time Factor.
Slave does not respond to the polling from master within the period of Life Time and then master assumes the slave is offline.