Siemens SINUMERIK 840D sl Function Manual

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System variable Meaning Value range Data type Possible access forPartprogramSynchronizedactionr w r w$A_MARKER‐SIPD[n]Image of the PLC markers n = 1, 2, ...6stands for thenumber of thedouble word (32bit) 1)INT x x$A_TIMERSI[n] Timer n = 1, 2...16stands for thenumber of thetimerREAL x x x xF_SENDDPInputs$A_FSDP_ERR_REAC[n]Response when a communicationerror occursn = 1, ..., 16stands for thenumber of the F-SENDDP rela‐tionship, is alsovalid for$A_FDFSDP_ERROR,$A_FSDP_SUBS_ON,$AFSDP_DIAGINT x x x xOutputs$A_FSDP_ER‐ROR[n]There is a communication error n = 1, ..., 16 BOOL x x$A_FSDP_SUBS_ON[n]Substitute values are output to theapplication at the F_RECVDP (re‐ceiver)n = 1, ..., 16 BOOL x x$A_FSDP_DIAG[n] The cause of the communication er‐ror determined by F_SENDDP iscommunicatedn = 1, ..., 16 INT x xF_RECVDPInputsData descriptions9.7 System variableSafety IntegratedFunction Manual, 12/2017, 6FC5397-4BP40-6BA1 507