Siemens sinumerik 840d Programming Manual page 574

Tables
15
15.2 List of system variables
Identifier Type
$A_STATSID INT
$A_CMDSI BOOL
INT
$A_LEVELSID
15-574
Description: System variable/value range/index
$A_STATSID
Safety: Status of cross-checking between NCK and PLC
if value is unequal to zero, an error has occurred in cross-checking
$A_CMDSI[n]
Safety: Control word for cross-checking between NCK and PLC.
Array index n = 1: Increase timer for signal change monitoring to 10 s
n: Number of control signal for cross-checking NCK – PLC
$A_LEVELSID
Safety: Display of signal change monitoring level. Indicates the
current number of signals marked for data cross-checking.
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA) – 04.00 Edition
04.00
15
Part pro Sync O S
RS R 5
RS W R W + 5
S
RS R 5
 Siemens AG 2000. All rights reserved