'DC Diagnostics' tab (EtherCAT Slave Online Functions)

The following information refers to a specific, typical device type. Your screen may differ.

This help topic describes the 'DC Diagnostics' editor of the EtherCAT 'Online Functions'. In the 'Online Functions' editor, select the EtherCAT slave station to be evaluated in the tree on the left and click the 'DC Diagnostics' tab on top of the editor on the right.

This editor tab is only available for EtherCAT slaves but not for the master.

The tab 'DC Diagnostics' displays diagnostic data relating to Distributed Clock settings of the slave and therefore about the entire Distributed Clock system. It is therefore only available for EtherCAT slave stations which support DC functionality. In addition, the information on this tab is only available/relevant if the slave clock is synchronized with the defined reference clock provider. To enable the DC clock function of the slave, double-click the slave node in the PLANT and open the 'Distributed clock' editor. In the drop-down list, activate the slave clock synchronization.

Further Info
Please also refer to the editor description "'Distributed Clock' Editor (EtherCAT Slave Device)".

'Distributed Clock'

Element Description

Sync Pulse Active 'Yes' means that the slave receives a sync pulse.

DC Sync 0 Period Indicates the update interval of the slave clock in accordance with the provided DC time (defined in the DC settings of the slave). The value relates to Sync Unit 0.
Currently, PLCnext Engineer does not support any user-defined DC-related settings. Therefore, the sync period displayed here corresponds to the EtherCAT cycle time.

DC Sync 1 Period Indicates the update interval of the slave clock in accordance with the provided DC time (defined in the DC settings of the slave). The value relates to Sync Unit 1.
Currently, PLCnext Engineer does not support any user-defined DC-related settings. Therefore, the sync period displayed here corresponds to the EtherCAT cycle time.

System Time Difference Time difference between the slave clock time and the reference time.

Element	Description
Sync Pulse Active	'Yes' means that the slave receives a sync pulse.
DC Sync 0 Period	Indicates the update interval of the slave clock in accordance with the provided DC time (defined in the DC settings of the slave). The value relates to Sync Unit 0. Currently, PLCnext Engineer does not support any user-defined DC-related settings. Therefore, the sync period displayed here corresponds to the EtherCAT cycle time.
DC Sync 1 Period	Indicates the update interval of the slave clock in accordance with the provided DC time (defined in the DC settings of the slave). The value relates to Sync Unit 1. Currently, PLCnext Engineer does not support any user-defined DC-related settings. Therefore, the sync period displayed here corresponds to the EtherCAT cycle time.
System Time Difference	Time difference between the slave clock time and the reference time.