Siemens 440 manual P20122 USS PZD length, 196, Pkw, Pzd

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Parameter Description

Issue 01/06

P2012[2] USS PZD length

 

 

Min:

0

CStat:

CUT

Datatype: U16

Unit: -

Def:

2

P-Group:

COMM

Active: first confirm

QuickComm.: No

Max:

8

Level

3

Defines the number of 16-bit words in PZD part of USS telegram.

Index:

P2012[0] : Serial interface COM link

P2012[1] : Serial interface BOP link

Notice:

USS protocol consists of PZD and PKW which can be changed by the user via parameters P2012 and P2013 respectively.

USS telegram

STX LGE ADR

Parameter

PKW

 

Process data

BCC

PZD

 

PKE

IND

PWE

PZD1

PZD2

PZD3

PZD4

STX

Start of text

 

PKE

Parameter ID

 

LGE

Length

 

IND

Sub-index

 

 

ADR

Address

 

PWE

Parameter value

 

PKW

Parameter ID value

 

 

 

 

PZD

Process data

 

 

 

 

 

BCC

Block check character

 

 

 

 

PZD transmits a control word and setpoint or status word and actual values. The number of PZD-words in a USS-telegram are determined by parameter P2012, where the first two words (P2012 >= 2) are either:

-control word and main setpoint or

-status word and actual value.

Restrictions:

-If the above serial interface controls the inverter (P0700 or P0719) then the 1st control word must be transferred in the 1st PZD-word.

-If the setpoint source is selected via P1000 or P0719, then the main setpoint must be transfered in the 2nd PZD-word,

-When P2012 is greater than or equal to 4 the additional control word (2nd control word) must transferred in the 4th PZD-word, if the serial interface controls the inverter (P0700 or P0719).

STW

HSW

 

STW2

 

ZSW

HIW

 

 

PZD1

PZD2

PZD3

PZD4

 

 

P2012

 

 

 

STW

Control word

 

HSW

Main setpoint

ZSW

Status word

 

HIW

Main actual value

PZD

Process data

 

 

 

196

MICROMASTER 440 Parameter List

6SE6400-5BB00-0BP0

Page 196
Image 196
Siemens 440 manual P20122 USS PZD length, 196, Pkw, Pzd