3.3
IDN1 Control Unit Cycle Time (t
Ncyc
)
The control unit cycle time specifies the intervals at which new setpoints can be sent by
the control unit. This parameter is transmitted in communication phase 2 and activated in
communication phase 3.
However, the following condition applies for the control unit cycle time:
IDN1 = IDN2
3.4
IDN2 Communication Cycle Time (t
Scyc
)
The communication cycle time specifies the intervals at which cyclic data is transmitted.
Valid times: 500, 1000, 2000, ... 8000 µs
Up to a maximum cycle time of 4 ms, the setpoints are interpolated linearly to 250 µs.
Interpolation is not performed for higher cycle times, resulting in poor regulation proper-
ties.
In addition, spline interpolation is available at a cycle time of 500 µs (see also IDN 3040).
In CP1+2, a 2 ms cycle time is always used (according to the sercos
®
standard) and the
desired cycle time can only be enabled in CP3 and onwards.
Data Length: 2 bytes
Non-Volatile:
No
Data Type:
Unsigned decimal
Write Access:
CP2
Minimum:
250
Run-Up Check:
CP2
Maximum:
8000
Cyclic Transfer:
Default:
2000
ASCII Param:
Units:
µs
Version:
3.5
IDN3 Shortest AT Transmission Starting Time (t
1min
)
The time required by the amplifier between end of MST and beginning of the amplifier’s
AT.
Data Length: 2 bytes
Non-Volatile:
Yes
Data Type:
Unsigned decimal
Write Access:
Read-only
Minimum:
Run-Up Check:
Maximum:
Cyclic Transfer:
Default:
2...4MBaud: 12
8...16MBaud: 4
ASCII Param.:
Units:
µs
Version:
3.6
IDN4 Transmit/Receive Transition Time (t
ATMT
)
The time required by the amplifier between the end of the AT and the beginning of the
next MDT.
Data Length: 2 bytes
Non-Volatile:
Yes
Data Type:
Unsigned decimal
Write Access:
Read-only
Minimum:
Run-Up Check:
Maximum:
Cyclic Transfer:
Default:
12
ASCII Param.:
Units:
µs
Version:
sercos
®
for S300/S700
23
Kollmorgen
04/2016
sercos
®
IDN Set
