Siemens Sinumerik 840D sl Function Manual page 545

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System variable $A_FSDP_ERR_REAC
The response when a communication error occurs is set using the system variable.
Depending on the actual interdependency of the two plant/system components
involved, the response to a communication error, caused by a communication path
error or by consciously switching off one the plant/system components can be
specifically entered.
0 = Alarm 27350 + STOP D/E
1 = Alarm 27350
2 = Alarm 27351 (only display, self--clearing)
3 = No system reaction
Note
The user interface is set in all cases:
$A_FSDP_ERROR = 1
$A_FSDP_SUBS_ON = 1
$A_FSDP_DIAG corresponding to the detected communication error
Whether initiated as fault response Stop D or Stop E, can be parameterized using:
NCK: $MN_SAFE_SPL_STOP_MODE
PLC: DB18.DBX36.1
Default value: After the control boots, initially, the values saved in MD
$MN_SAFE_SDP_ERR_REAC become active.
System variable $A_FSDP_ERROR
The system variable is used to indicate that there is a communication error. The
error cause determined by F_SENDDP is contained in the diagnostics data
$A_FSDP_DIAG.
0 = Normal mode
1 = Communication error
System variable $A_FSDP_SUBS_ON
The system variable is used to indicate that substitute values are output to the
application at F_RECVDP (receiver).
0 = output of process values
1 = output of substitute values
System variable $A_FSDP_DIAG
The system variable is used to indicate the cause of the communication error
determined by F_SENDDP.
Bit 0 -- 3: Reserved
Bit 4: 1 = timeout detected
Bit 5: 1 = sequence number error detected
Bit 6: 1 = CRC error detected
Bit 7 -- 12: Reserved
Bit 13: 1 = Discrepancy in the F telegram data (TelegramDiscrepancy)
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SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) - - 10.2015 Edition
Data Description
8.7 System variables
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