Vacon OPTC4, User Manual

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6 • vacon technical data
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2
converters. Attention should be paid to proper grounding of the shield to ensure bus
operation. Grounding of the shield should be done at both ends of the cable.
Cable type
Max. doubly
terminated
bus length
Max. free
topology
wire length
Max. node-to-node
distance
Belden 85102 (unshielded) 2700 m 500 m 500 m
Belden 8471
LONAK 2x1,3 (unshielded) 2700 m 500 m 400 m
Level IV, 22AWG
LONAK 2x2x0,65 (unshielded) 1400 m 500 m 400 m
JY (St) Y 2x2x0.8mm
LONAK 2x2x0,8 (shielded) 900 m 500 m 320 m
Table 2-2. Line length for different transmission speeds
2.3 Profiles
LonMark Functional Profiles describe in detail the application layer interface, including the network
variables, configuration properties, and default and power-up behaviors required on LonMark devices
for specific, commonly used control functions.
2.3.1
Variable Speed Drive Profile
Leading manufacturers of drive technology have jointly defined the LonMark profile. The profile
specifies how the drives are to be parameterized and how the setpoints and actual values are to be
transmitted. This enables drives from different vendors to be exchanged. The profile contains
necessary specifications for speed control and positioning. It specifies the basic drive functions while
leaving sufficient freedom for application-specific expansions and further developments.