ECATMasterStatus

Description

This function block reads the EtherCAT***EtherCAT is an open, high-performance Ethernet-based fieldbus system. The development goal of EtherCAT was to apply Ethernet to automation applications which require short data update times (also called cycle times) with low communication jitter (for synchronization purposes) and low hardware costs master state and the lost frame counter, to determine if EtherCAT is running normally.

• 
  
• See the EtherCAT Communication Diagnosis Steps section of the Troubleshooting chapter for more information.

Figure 7-197: ECATMasterStatus function block

Arguments

Input

Enable	Description	Request to read the ECAT master state and the lost frame count. Keeps continously reads the master state and the lost frame count as long as the Enable remains high.
	Data type	BOOL
	Range	0,1
	Unit	N/A
	Default	—

Output

Valid	Description	Indicates the values at the 'State' and LostFrameCount outputs are valid.
	Data type	BOOL
	Unit	N/A
Error	Description	Indicates error
	Data type	BOOL
	Unit	N/A
ErrorID	Description	Error code when when the function block failed due to error.
	Data type	DINT
	Unit	N/A
State	Description	Indicates the ECAT state of the Master. See State Defines for details
	Data type	UINT
	Unit	N/A
LostFrameCount	Description	Total cumulative number of cyclic frames sent with no-response since the ECAT started by calling the MLMoitonStart. Missing return frames will generate an A38 alarm. The Counter is reset to 0 when the MLMotionStart is called.
	Data type	UDINT
	Unit	N/A

State Defines

#define   EC_STATE_NO_COMMUNICATION   0   (* 0x00 = No Communication to device *)
#define   EC_STATE_INIT               1   (* 0x01 = Device in Init state *)
#define   EC_STATE_PREOP              2   (* 0x02 = Device in Pre-operational state *)
#define   EC_STATE_BOOTSTRAP          3   (* 0x03 = Device in Bootstrap state *)
#define   EC_STATE_SAFEOP             4   (* 0x04 = Device in Safe-Operational state *)
#define   EC_STATE_OP                 8   (* 0x08 = Device in Operational state *)

Related Functions

ECATWCStatus, ECATDeviceStatus.

Examples

Structured Text

//  ECATMasterStatus
Inst_ECATMasterStatus( True );
MasterSTate := Inst_ECATMasterStatus.State;
MasterLastFrameCount := Inst_ECATMasterStatus.LostFrameCount;

FBD

FFLD

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