Communication Error After The Control Boots And Active Spl Processing - Siemens SINUMERIK 840D sl Function Manual

Connecting sensors and actuators
8.4 Safety-related CPU-CPU communication (F_DP communication)
After an error-free boot, the cyclic F-communication is represented in the output data of the
user interface as follows:
● F_SENDDP (NCK)
$A_FSDP_ERROR[1...n] = 0
$A_FSDP_DIAG[1...n] = 0
$A_FSDP_SUBS_ON[1...n] = 0
● F_SENDDP (PLC)
FSDP[1...3] or FSDP_HF[4..16]
.ERROR = FALSE
.SUBS_ON = FALSE
.DIAG = 0
.RETVAL14 = 0
.RETVAL15 = 0
● F_RECVDP (NCK)
$A_FRDP_ERROR1...n] = 0
$A_FRDP_DIAG1...n] = 0
$A_FRDP_SUBS_ON1...n] = 0
$A_FRDP_ACK_REQ1...n] = 0
$A_FRDP_SENDMODE1...n] = X (value corresponding to the received F-telegram)
● F_RECVDP (PLC)
FRDP[1...3] or FRDP_HF[4..16]
.ERROR = FALSE
.SUBS_ON = FALSE
.ACK_REQ = FALSE
.SENDMODE = X (value corresponding to the received F-telegram)
.DIAG = 0
.RETVAL14 = 0
.RETVAL15 = 0
When cyclic F-communication is established, the process values received by F_SENDDP are
output at the SPL inputs $A_INSE / SPL_DATA.INSEP.
• $A_INSE / SPL_DATA.INSEP[x...y] = process values
Note
User acknowledgment is not required for the transition from booting into cyclic F-
communication.
8.4.9

Communication error after the control boots and active SPL processing

After a communication error has been detected, F_RECVDP outputs the substitute values
$A_FRDP_SUBS / FRDP[1..3].SUBS or FRDP_HF[4..16] programmed in the user program to
the SPL inputs ($A_INSE / SPL_DATA.INSEP).
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Function Manual, 12/2017, 6FC5397-4BP40-6BA1
Safety Integrated