Extended instructions
8.3 Distributed I/O (PROFINET, PROFIBUS, or AS-i)
S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG
323
96 The "RALRM (Page 318)" cannot supply the OB start
information, management information, header
information, or additional interrupt information.
For the following OBs, you can use the "DPNRM_DG
(Page 328)" instruction to read the current diagnostics
message frame of the relevant DP slave asynchronously
(address information from OB start information):
• Hardware interrupt (Page 87)
• Status (Page 93), Update (Page 93) or Profile
(Page 94)
• Diagnostic error interrupt (Page 89)
• Pull or plug of modules (Page 91)
A0 Read error Negative acknowledgement while reading from the
Negative acknowledgement while writing to the module
A2 Module failure DP protocol error at layer 2 (for example, slave failure or
A3 Reserved, pass
• PROFIBUS DP: DP protocol error with Direct-Data-
Link-Mapper or User-Interface/User
• PROFINET IO: General CM error
Communication on the communication bus disrupted
DP slave or modules is occupied (temporary error).
A8 Version conflict DP slave or module reports non-compatible versions.
Feature not supported by DP slave or module
AA to AF User specific DP slave or module reports a manufacturer-specific error
in its application. Please check the documentation from
the manufacturer of the DP slave or module.
B0 Invalid index Data record not known in module; illegal data record
B1 Write length error The length information in the RECORD parameter is
incorrect.
• With "RALRM": Length error in AINFO
: Refer to the online information system of
STEP 7 for immediate access to information on how
to interpret the "AINFO" returned buffers.
• With "RDREC (Page 315)" and "WRREC
(Page 315)": Length error in "MLEN"
The configured slot is not occupied.
B3 Type conflict Actual module type does not match specified module
DP slave or module reports access to an invalid area.
DP slave or module not ready
DP slave or module denies access.
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