Plc User Interface Signals; Address Ranges - Siemens SINUMERIK 802C base line Technical Manual

Technical Appendix
6.2

PLC user interface signals

6.2.1

Address ranges

Generating the V address range
Definition of special flag bits (SM) (read-only)
Variable access rights
6-16
The following tables of the user interface signals between PLC and CNC (and
vice versa) are handled by the integrated fixed user program.
These signals can be displayed using PLC Status in the Diagnosis/Start-
Up/PLC Status menu.
Operand Identifier
V
T
C
I
Q
M
SM
AC
Type Range No.
Identifier (Channel /
(DB No.) Axis No.)
10
(10–79) (00–99)
SM Bits
SM 0.0 Flags with a defined ONE signal
SM 0.1 Initial position: first PLC cycle '1', following cycles '0'
SM 0.2 Buffered data lost – only valid in the first PLC cycle ('0' – data
o.k., '1' – data lost)
SM 0.3 Power On: first PLC cycle '1', following cycles '0'
SM 0.4 60 s clock (alternating '0' for 30 s, then '1' for 30 s)
SM 0.5 1 s clock (alternating '0' for 0.5 s, then '1' for 0,5 s)
SM 0.6 PLC cycle clock (alternating one cycle '0', then one cycle '1')
Notice
All empty user interface fields in the following tables are Reserved for
SIEMENS and may neither be written, nor evaluated by the user!
All fields with a "0" contain the value "logic =".
[r] is used to mark a read-only range
[r/w] is used to mark a read/write range
Description
Data
Timers
Counters
Image of digital inputs
Image of digital outputs Q0.0 to Q7.7
Flags
Special flags
ACCU
Subrange
00 0
(0–9)
Description
Range
V0.0 to V79999999.7 (see
below)
T0 to T15
C0 to C31
I0.0 to I7.7
M0.0 to M127.7
SM0.0 to SM 0.6 (see below)
AC0 ... AC3
Offset Addressing
000 symbolic
(000–999) (8–digit)
SINUMERIK 802C base line
Start-Up