Efficient Networks S120 manual Telegram structure, Structure of the telegrams

Communication PROFIBUS DP/PROFINET IO 10.1 Communications according to PROFIdrive

The telegram structure

The parameter p0978 contains the sequence of DOs that use a cyclic PZD exchange. A zero delimits the DOs that do not exchange any PZDs.

If the value 255 is written to p0978, the drive unit emulates an empty drive object that is visible to the PROFIdrive controller. This permits cyclic communication of a PROFIdrive controller

●with unchanged configuration to drive units that have a different number of drive objects.

●with deactivated DOs without having to change the project.

Note

•The following must apply to ensure conformity with the PROFIdrive profile:

–Interconnect PZD receive word 1 as control word 1 (STW1).

–Interconnect PZD send word 1 as status word 1 (STW1). Use WORD format for PZD1.

•One PZD = one word.

Only one of the interconnection parameters (p2051 or p2061) can have the value ≠ 0 for a PZD word.

•Physical word and double word values are inserted in the telegram as referenced variables.

p200x are relevant as reference values (telegram contents = 4000 hex or 4000 0000 hex for double words if the input variable has a value of p200x).

Structure of the telegrams

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$SSOFODVV









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1,67B$

162//B%

1,67B%

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Figure 10-5 Overview of standard telegrams and process data

350	Drive Functions
	Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4