Siemens SINUMERIK 840D Description Of Functions page 264

4 Data Descriptions
4.4 System variable
System variables Meaning
$A_MARKERSIPD[n] Image of PLC the markers
(from SW 4.4.18)
Timer
$A_TIMERSI[n]
$A_STATSID Crosswise data comparison error
initiated if the value is not equal to 0
$A_CMDSI 10-fold change timer timeout value for
long forced checking procedure pulses
and/or single-channel test stop logic.
$A_LEVELSID Crosswise data comparison stack level
display: Number of signals for which
NCK and PLC detect different signals
Note:
l -> read, s -> write
An implicit preliminary stop is generated
Only permitted in the commissioning phase
4-264
SINUMERIK 840D/SIMODRIVE 611 digital SINUMERIK Safety Integrated (FBSI) - Edition 11.03
Value range Data type Possible access for
Part
program
l
n = 1, 2 INT x
n = 1, 2...16 REAL x
stands for
No. of timer
n = 0 Error not INT x
triggered
n = 1 Error
triggered
Bit 0 = 0 BOOL x
10-fold time
active
0...320 INT x
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11.03
Synchr.
action
s l s
x
x x x
x
x x x
x