Siemens SINUMERIK 880 SW 6 Planning Manual page 357

14 Command Channel (DB 41)
14.3 User interface signals
Time axis
Request bit in com-
mand channel head
Error bit in user
interface head
Error number in user
interface valid
(a) By PLC user program
(b) By PLC operating system
Signal chart for abortion of command channel function owing to error
14–6
t
(b)
(b)
© Siemens AG 1991 All Rights Reserved
05.91
(a)
6ZB5 410-0HE02
SINUMERIK 880 (PJ)