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4-36 Fieldbus interfaces
SYNAX
of all elements that describe a parameter is possible. These elements
are:
Read access
• the attributes,
• minimum and maximum input values,
• the name,
• the unit and
• the operating data.
The unit address is read in the command telegram and copied into the
reaction telegram.
Unit address
The serial Indramat interface permits
• direct communication with drives,
• accessing drive parameters via the CLC.
Given communication with a SERCOS master (e.g., CLC) implementing
a fieldbus interface, then the master must be informed as to which unit
the request relates to. This unit can be the SERCOS master itself or any
of the drives it controls.
The address set at the drive controller or "0" are transmitted.
7
0
x x x x x x x x
1 .. 254 drive address
0
SERCOS master (CLC)
Fig. 4-34: Unit address
The parameter number has the form determined in the SERCOS
interface specification. To be able to also address control parameters,
one byte is set ahead of the address to identify the parameter type.
Parameter number and type
parameter type
7
parameter number
0
15
0 0 0 0 0 0 x x
8
x x x x x x x x
7
0
x x x x x x x x
parameter no.
[0 ... 4095]
parameter block
[0 ... 7]
00
00
01
10
0
1
0
0
S parameter (drive)
P parameter (drive)
A parameter (CLC control card)
C parameter (CLC control card)
Fig. 4-35: Parameter identification (parameter transmission)
DOK-SYNAX*-SY*-06VRS**-FK01-EN-P