Installation manual

Danaher Motion Kollmorgen SERCOS Interface Setup
SERVOSTAR
®
S and SERVOSTAR
®
CD Series 60
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, refer to 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
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
SERVOSTAR 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, no matter what the address.