Installation manual

SERCOS Interface Setup 08/04 Danaher Motion Kollmorgen
56 M-SS-001-01 Rev. T SERVOSTAR S Installation
The maximum and minimum cable lengths may be calculated by
dividing the maximum and minimum signal attenuations by the
cable attenuation. The following table shows the cable lengths for 1
mm plastic fiber with an attenuation of 0.18 dBm/m:
Cable Length Specifications
Length Low Power High Power
Maximum 54.7 m 71.4 m
Minimum - 10.3 m
Note:
1) Fiber optic cable attenuation is 0.18 dBm/m.
2) Cable length calculations assume that the fiber is not attenuated by intermediate
connections.
For most applications, the low power setting is sufficient. Longer
cable runs or the use of intermediate connectors may require the
high power setting. Communication problems may occur if the
power level at the receiver is too large or too small. Receiver power
problems may cause erroneous data transfer resulting in the drive
returning to CP0, or failure to advance out of CP0.
For more information on SERCOS interface signal attenuation, read
the following sections of the IEC 61491 SERCOS interface
specification:
− 5.3 - Optical Signals on the Transmission Line
− Annex G: Attenuation on the Transmission Line
6.2 Status Display
After the CP run-up sequence has completed the drive will be in
OPMODE 5 when communicating on a SERCOS interface ring.
This is indicated by the number 5 on the Status Display. The
SERCOS interface version of the SERVO
STAR differs from the
standard unit in that errors and faults are not communicated
through this display (only through the SERCOS interface ring to the
controller). Therefore, if an error occurs, the 5 remains on the
display. The status display decimal point operates identically to that
of the standard unit in that it turns ON and OFF when the drive is
enabled or disabled.
The SERCOS interface version of the SERVOSTAR is not
automatically enabled on power-up, regardless of the
address.