Fb 199 Fifo First In First Out (Turning Version) - Siemens SINUMERIK 840 Planning Manual

5 Configuring
5.22 FB 199 First in first out (turning version)
5.22 FB 199 FIFO
First in first out (turning version)
for SINUMERIK 880/880 GA2 and package 2 only
Description
The FB "FIFO" is used to enter data that are provided at a high speed in a data buffer. These
data can be read later, i.e. when required. A maximum of 255 data lines can be stored by me-
ans of this block. The DBs for the buffer entries are created at the initial setting.
Optionally, three or four data elements can be stored via the "DBAN" parameter (first DB and
number of DBs). The user has to make sure that the respective value is entered in this para-
meter at the initial setting.
DBSP
Write/read
DW 0
pointer
EW1/AW1
DW 1
:
:
:
DW n
EW1/AW1
Block data
Lib. No.
FBs to be loaded
DBs to be loaded
Type of FB call
DBs to be input
Error messages
In the case of a conditional call, the user has to make sure that the block
is executed at the initial setting or that the data blocks required for
storing the data are generated by the calling program.
5–94
DBSP + 1
Numb. of entries/
status word
EW2/AW2
:
:
:
EW2/AW2
: E88530-B-5599-A
: FB199
: None
: Unconditional
: None
: None
© Siemens AG 1991 All Rights Reserved
DBSP + 2 DBSP + 3
EW3/AW3 EW4/AW4
: :
: :
: :
EW3/AW3 EW/AW4
6FC5 197-0AA40-1BP1
SINUMERIK 840/880 (PJ)
01.91