Siemens Sinumerik 840D sl Function Manual page 516

Data Description
8.6 Interface signals
DB 18
DBW216
DBW218
DB 18
Data block
Byte Bit 7 Bit 6
DBW448
DBB450
DBB451
DBW452
DBW454
DBW456
DBW448
DBB450
DBB451
DBW452
DBW454
DBW456
...
DBW568
DBB570
8-516
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) - - 10.2015 Edition
F_SENDDP 1..3
FSDP[3].RETVAL14
FSDP[3].RETVAL15
F_SENDDP 4..16
Interface PLC <----> NCK
Bit 5 Bit 4 Bit 3
FSDP HF[4].ERR_REAC
FSDP_HF[4].DIAG FSDP HF[4].DIAG
FSDP HF[4].RETVAL14 FSDP_HF[4].RETVAL14
FSDP HF[4].RETVAL15 FSDP_HF[4].RETVAL15
FSDP HF[5].ERR_REAC
FSDP_HF[5].DIAG FSDP HF[5].DIAG
FSDP HF[5].RETVAL14 FSDP_HF[5].RETVAL14
FSDP HF[5].RETVAL15 FSDP_HF[5].RETVAL15
...
FSDP HF[16].ERR_REAC
Bit 2 Bit 1
FSDP
HF[4].
SUBS_ON ERROR
FSDP
HF[5].
SUBS_ON ERROR
FSDP
HF[16].
SUBS_ON ERROR
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10/15
Bit 0
FSDP
HF[4].
FSDP
HF[5].
FSDP
HF[16].