Operating instructions

5. How to Access the Parameters

5.1. Parameter Access in General

In an automated SYSTEM, frequency converter parameters can be accessed either from the proc-

ess controller (i.e. PLC), or from various kinds of HMI equipment. For parameter access from

controllers and HMI, please observe the following:

FC 100, 200 and 300 parameters are located in four separate set-ups. Parameter access in the

drive is performed via several separated parameter channels, which can be used individually to

access a certain parameter set-up. Select the desired set-up in par. 0-11

Edit set-up

or 9-70

Parameter set-up selection

Using this mechanism it is possible to Read or Write to and from parameters in a certain set-up

from a master class 1, e.g. a PLC, and simultaneously access parameters in a different set-up from

a master class 2, e.g. a PC tool, without interfering with the set-up selection for the programming

sources.

Parameters can be accessed via the following sites:

LCP on FC 100, 200 and 300

FC Protocol on RS485 or USB

Cyclical data access on DP V0 (PCV Channel)

PROFIBUS Master Class 1

PROFIBUS Master Class 2 (3 connections possible)

Please note that although these parameter channels are separated, data conflict can

occur if write to parameters is made from a HMI unit into a set-up which is actively

in use by the frequency converter or the process controller (e.g. a PLC).

5.1.1. Data Store

Parameter write via the PCV channel (DP V0) will be stored in RAM only. If data has to be stored

in Non Volatile Memory, the par. 9-71

PROFIBUS save data values

can be used for storing one or

more set-ups.

Using DP V1 access, parameters can be stored either in RAM or Non-Volatile Memory by choice

of a specific Write Request command. Non-stored data can at any time be stored in non-volatile

memory by activating par. 9-71

PROFIBUS save data values

VLT

Profibus 5. How to Access the Parameters

MG.33.C4.02 - VLT

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