Operating instructions

7. Application Examples

7.1. E.g.: Process Data with PPO Type 6

This example shows how to work with PPO type 6, which consists of Control Word/Status Word

and Reference/Main Actual Value. The PPO also has two additional words, which can be pro-

grammed to monitor process signals:

PCV PCD

1 2 3 4 5 6 7 8 9 10

PCA IND PVA CTW MRV PCD PCD PCD PCD PCD PCD PCD PCD

STW MAV

Byte no. 1 2 3 4 5 6 7 8

9 10 11 12

13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28

Type 6:

The application requires monitoring of the motor torque and digital input, so PCD 3 is set up to

read the current motor torque. PCD 4 is set up to monitor the state of an external sensor via the

process signal digital input. The sensor is connected to digital input 18.

An external device is also controlled via control word bit 11 and the built-in relay of the frequency

converter. Reversing is permitted only when the reversing bit 15 in the control word and the digital

input 19 are set to high.

For safety reasons the frequency converter will stop the motor if the PROFIBUS cable is broken,

the master has a SYSTEM failure, or the PLC is in stop mode.

Program the frequency converter as follows:

VLT

Profibus 7. Application Examples

MG.33.C4.02 - VLT

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