Siemens 440 - Manual (Page 196)

Parameter Description Issue 01/06
MICROMASTER 440 Parameter List
196 6SE6400-5BB00-0BP0
P2012[2] USS PZD length Min: 0
CStat: CUT Datatype: U16 Unit: - Def: 2
P-Group: COMM Active: first confirm QuickComm.: No Max: 8
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.
PKE IND PWE
STX
LGE
ADR
STX LGE ADR BCC
PZD1 PZD2 PZD3 PZD4
PKE
IND
PWE Parameter ID
Sub-index
Parameter value
PKW PZD
PKW
PZD
BCC
Start of text
Length
Address
Parameter ID value
Process data
Block check character
Process data Parameter
USS telegram
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
ZSW
STW
ZSW
PZD Control word
Status word
Process data
STW2
HSW
HIW Main setpoint
Main actual value
HSW
HIW
P2012
PZD1 PZD2 PZD3 PZD4
Level
3