5 Configuring 01.91
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.
DW 0
DW 1
DW n
DBSP DBSP + 1 DBSP + 2 DBSP + 3
Write/read
pointer
Numb. of entries/
status word
EW1/AW1 EW2/AW2 EW3/AW3 EW4/AW4
:
:
:
:
:
:
:
:
:
:
:
:
EW1/AW1 EW2/AW2 EW3/AW3 EW/AW4
Block data
Lib. No. : E88530-B-5599-A
FBs to be loaded : FB199
DBs to be loaded : None
Type of FB call : Unconditional
DBs to be input : None
Error messages : None
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 © Siemens AG 1991 All Rights Reserved 6FC5 197-0AA40-1BP1
SINUMERIK 840/880 (PJ)
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