Lenze L-force I/O System 1000 - Manual (Page 33)

2.0 EN - 11/2010
L
33
L-force Controls | I/O System 1000
Parameter setting
Electronic modules - digital input
6.2.2.2 TimeStamp function
Description
Long cycle times or cycle times varying as a function of the fieldbus load will inevitably lead
to large inaccuracies if switching at an exact point in time is required. Using the
TimeStamp function, the operating times of the outputs can be exactly calculated up to
1 μs.
Electronic modules with TimeStamp function are equipped with an internal ticker. To
make sure that all tickers always have the same time base, they are synchronised within a
station via the backplane bus of the CAN bus coupler.
 The ticker works with a resolution of 1 μs. After power-on, it starts counting from
0 … 65535 μs and then starts with 0 again.
 For digital input and output modules with TimeStamp function, both the channel
status and the ticker value are stored in the process image if an edge change of the
signal occurs.
 Up to 15 DI switching requests (subindex entries) with TimeStamp function can be
sent.
 In the Lenze setting, 2 switching requests are automatically assigned to a PDO.
Additional switching requests can only be supported through manual mapping, e.g.
using the PLC Designer.
Edge evaluation -
rising edge
Selection of the signal edge of the input signal for the generation of a
TimeStamp entry.
Click the input field to open the drop down menu.
• Inhibit
–In the case of a rising edge, no TimeStamp entry is generated.
• Enable
–In the case of a rising edge, a TimeStamp entry is generated.
0x3104
Edge evaluation -
falling edge
Selection of the signal edge of the input signal for the generation of a
TimeStamp entry.
Click the input field to open the drop down menu.
• Inhibit
–In the case of a falling edge, no TimeStamp entry is generated.
• Enable
–In the case of a falling edge, a TimeStamp entry is generated.
0x3105
Legend Description Index