Explanations Of The Fb Designations - Siemens SINUMERIK 840 Planning Manual

3 Guidelines

3.3 Explanations of the FB designations

3.3 Explanations of the FB designations
FB call
FB name
§I,.. Q,...
I,BI - Q Q - Q,BI
I,BI - I I - Q,BI
D,..
B
T
C
$F... $F...
$DW... $DW...
*F... *F...
*DW... *DW...
- % 1
- %v1
3–14
Parameter
Type of parameter
I Input BI Operand with
Q Output bit address
BY Operand with
byte address
W Operand with
word address
B Block Not applicable
T Timer Not applicable
C Counter Not applicable
D Data KM Binary pattern,16 positions
KY Two absolute values in bytes, from 0 to 255
KH Hexadecimal number, max. of 4 positions
KS Two alphanumeric characters
KT Time value (1.0 to 999.3)
KC Count value (0 to 999)
KF Fixed-point number (-32768 to +32767)
I,BI Input signal, static
I,BI -Q Input signal acknowledged by the FB
I,BI - I Input signal, positive-going edge evaluated
§I,.. No DWs permissible as parameters
$... Input signal which must be applied before calling the FB
Fixed input signal which need not be applied, e.g. NC
*...
signal
Q,BI Output signal, static
Q- Q,BI Output signal which must be acknowledged by the user
Output signal for one cycle (pulse)
I- Q,BI Output signal on defined flag or data word which can be
$... evaluated immediately after the FB
Defined output signal, e.g. NC signal
Error number ACCU2 at system stop (STS); ACCU 1
*... FB number
% 1 Additional specification of interface byte number in HIGH-
byte
%v1 ACCU 2
© Siemens AG 1991 All Rights Reserved
11.92
Allowed
actual operand
I n.m Input
Q n.m Output
F n.m Flag
IB n Input byte
QB n Output byte
FY n Flag byte
DL n Data byte left
DR n Data byte right
PB n I/O byte
IW n Input word
QW n Output word
FW n Flag word
DW n Data word
PW n I/O word
DB n Data block
FB n Function block
PB n Program block
SB n Sequence block
T n No. of timer
C n No. of counter
6FC5 197-0AA40-1BP1
SINUMERIK 840/880 (PJ)