Siemens SINAMICS S120 Brève description - Page 6

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2 Explanation of the Blocks

Explanation of the Blocks

2.1

FB11 "CtrlUnit_FB"

The FB coordinates the cyclic process data transfer between the PLC and the

Control Unit (CU_S) of the SINAMICS S120 on the basis of the extended

SIEMENS frame 390. This requires the drive (STARTER) as well as the controller

(STEP 7, HW Config) to be configured with the SIEMENS frame 390 that was

extended by the alarm and error code.

With the extended SIEMENS frame 390 the following data is exchanged:

Table 2-1: Data transferred with the extended SIEMENS frame 390

PZD

S7-300/400F

Word

CU_STW1 (CU_S control word)

A_DIGITAL (CU_S digital outputs)

Details on the frame contents can be found in the SINAMICS S120/S150 list

manual in chap. 2.3 (/7/).

The FB11 uses the system functions SFC14 and SFC15.

With regard to the control unit you can do the following with FB11 ...

acknowledge errors

detect pending alarms and errors,

signal group alarms and group errors,

read/write access to DO/DI of the CU.

You can therefore use the FB 11 as interface to SINAMICS G120 in your own

applications. You should call it cyclically in OB1.

SINAMICS S120 at S7-300/400F

Entry-ID: 68624711,

V1.1,

SINAMICS S120

12/2014

SINAMICS S120

CU_ZSW1 (CU_S status word)

E_DIGITAL (CU_S digital inputs)

WARN_CODE

FAULT_CODE

S7-300/400F