Explanation of the process data

Standard digital output (default)

The outputs can be written directly with this standard PDO assignment, i.e. the connected actuators can be switched frame-triggered directly.

Explanation of the process data 1: — Standard EL2595 process image

The EL2595 (A) has 2-byte variables at its disposal with different bit meanings. These can be seen by expanding the tree (A). They are also displayed in the detail view (B) if the appropriate display function (C) is activated.

The bit meaning i.e. offset position can then also be taken from the memory assignment display (E), taking into account the variable size (D).

Both the collective name e.g. Status and the individual bit variable e.g. "Output active" can be linked, but not both at the same time.

Input data
Collective name	Name	Description / function	Bit position [0..15]
Status	Ready to activate	The terminal signals its readiness for operation here.	0
	Output active	The output is actively switched.	1
	Warning	A warning has occurred - > evaluate “Diag data” (index 0xA000).	6
	Error	An error has occurred and the output driver is deactivated - > evaluate "Diag data" (index 0xA000).	7
	Digital input	The status of the digital input is returned here.	11
	TxPDO Toggle	Changes its state each time process data are exchanged.	15
WcState		Setpoint during operation: 0 Each datagram of the EL2595 indicates its processing state here. This allows the EL2595 to be monitored for correct process data communication.
InfoData (State)		Setpoint during operation: 8 Status display of the “EtherCAT state machine”
AdsAddr		AMS address of the responsible EtherCAT Master in the format "0.0.0.0.0.0". In addition, the port number valid for this Slave. Required for acyclic accesses to the CoE at runtime.

Output data
Collective name	Name	Description / function	Bit position [0..15]
Control	Output	Switches the output active	1
	Input trigger enable	"Arms" the digital input as a trigger input	3
	Reset	Resets an error	7

Standard digital output with InfoData

Explanation of the process data 2: — Additional information data

Two further cyclic data words can be displayed per channel for more exact information about the states of the actuators or the driver stage. The respective selection is to be configured via the corresponding Index 0x8002:11 or 0x8002:19 in the CoE. Among other things, the interior temperature of the terminal or the momentary current through the connected actuator can be selected, for example.

Input data
Name	Description / function
Info data 1	Additional channel information, definition in 0x8002:11
Info data 2	Additional channel information, definition in 0x8002:19

External trigger input

Explanation of the process data 3: — Additional process data in the "External trigger input" mode

In addition to the variables of the "Standard digital output" mode, there are also the following variables:

Output data
Name	Description / function
Input trigger enable	"Arms" the digital input as a trigger input
Impulse length	Specifies the length of the output pulses. The unit is 1 µs. The data type UDINT (double word) provides the user with maximum flexibility and can specify pulses from 1 µs to approx. 1 hr with a high resolution.
Trigger delay	Specifies the length of the delay from the time of the digital input to the switching of the output. The unit here is similarly 1 µs.

External trigger input with InfoData

Like both standard data types, additional information data can also be displayed in "External trigger input" mode. See above.

DC Digital output

Explanation of the process data 4: — Additional process data for Distributed Clocks mode

In Distributed Clocks mode the EL2595 works according to timestamp order. The process image is structured correspondingly, as in the fig. Additional process data for Distributed Clocks mode.

Input data
Name	Description / function
Feedback	The terminal returns the current state of the output channels in this byte. This can be used to check a switching order. Bit 0: Output channel 1

Output data
Activate	This byte activates a new start time in the terminal through the transition 0 --> 3. The sequence: in an EtherCAT cycle Activate = 0, transmit the target state of the two output channels and desired start time to the EL2595 activate the switching order in the following EtherCAT cycle with Activate = 3
Start time	64-bit value of the next desired switching event. The data of the DC time: Start time 1.1.2000 Resolution 1 bit = 1 ns

Output data

Name

Description / function

Activate

This byte activates a new start time in the terminal through the transition 0 --> 3. The sequence:

in an EtherCAT cycle Activate = 0, transmit the target state of the two output channels and desired start time to the EL2595
activate the switching order in the following EtherCAT cycle with Activate = 3

Start time

64-bit value of the next desired switching event.

The data of the DC time:

Start time 1.1.2000
Resolution 1 bit = 1 ns

Switching time

The desired switching time must be far "enough" in the future, as seen from the time of calculation, in the NC/PLC in order to be capable of being conveyed to the terminal, including activation. Since 2 EtherCAT cycles are required for the activation, it is recommended not to make this interval smaller than 3 cycles.

DC Digital output with InfoData

Like both standard data types, additional information data can also be displayed in DC mode. See above.