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2 Explanation of the Blocks

2.4 FB20 "Parameter_Access"

2.4.2

Job and response data record

The FB 20 "Parameter_Access" only coordinates the data exchange between PLC

and SINAMICS S120. It furthermore checks whether the transmission was

successful and whether an error ID was set in the response of the drive. However,

you have to create the order and response data records yourself. Since their form

regarding structure and length depends on the data to be transmitted, it is very

difficult to write on data records universally valid. However, you can orientate

yourself on the template of data record 47

example DBs of this short docu listed in the following application example.

Reading parameters

The parameters p1120 (run-up time), p1121 (ramp-down time) and p945 (fault

memory, with 16 indices) are to be read-out from the SERVO 1 drive object of the

SINAMICS S120 drive system.

Figure 2-5: Reading parameter – order data record (order DB)

The number of the drive object is entered here

SINAMICS S120 Function manual (\7\),

Chap. 11.1.4.3 Acyclic communication > Determining the drive object numbers

SINAMICS S120 at S7-300/400F

Entry-ID: 68624711,

V1.1,

CU_S (Control unit)

A_INF (Line module) = 2

SERVO 1 (drive 1)

SERVO 2 (drive 2)

12/2014

(see footer

on page

= 1 (always 1)

= 3

= 4

13) and the