Lenze EVS9332xP Manuel d'utilisateur télécharger pdf (Page 154)

100

101

Function library

Function blocks

3.5.12 BCD decade switch (BCD)

3−126

EDSVS9332P−EXT DE 2.0

With handshaking, minimum wiring

Set BCD mode = 1.

BCD_C

B C D x - N E W - D A T A

B C D x - D A T A x

B C D x - R E A D

2 n d c y c l e 3 r d c y c l e 1 s t c y c l e1 s t c y c l e

( 4 i n p u t s )

( I n p u t )

( O u t p u t )

Fig. 3−79 Sequence of handshaking

Function

l The superimposed control (e.g. PLC) determines the time of data transmission.

l After the acceptance signal has been sent from the control to BCDx−READ the BCD is read.

– The signal must be sent for every BCD.

– The reading routine of the FB BCD remains in waiting position until the data transmission is

started.

The BCDs are read in the following sequence:

1. Sign

2. BCD 1

3. BCD 2

4. etc.

Transmission sequence of a BCD:

Input/output Signal Function

BCDx−DATA1 ...

BCDx−DATA4

Generating data for the first or next BCD via PLC.

BCDx−NEW−DATA HIGH Enables the transmission for the next BCD.

BCDx−READ LOW−HIGH edge Reading of the BCD data to the FB BCD.

BCDx−NEW−DATA LOW Inhibits the transmission for the next BCD.

BCDx−READ LOW Set via PLC.

1 2 ... 149 150 151 152 153 154 155 156 157 158 159 ... 333 334

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Lenze EVS9332xP Manuel d'utilisateur Page 154

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