Distributed I/O Instructions; Diagnostic Instructions - Siemens SIMATIC S7 System Manual

IO access errors
These errors are written to the diagnostics buffer. The CPU does not take any action or
switch to STOP.
10.2.8

Distributed I/O Instructions

The following Distributed I/O instructions (Page 260) can be used as indicated with
PROFINET:
● RDREC instruction (Page 260): You can read a data record with the number INDEX from
● WRREC instruction (Page 260): You can transfer a data record with the number INDEX
● RALRM instruction (Page 263): You can receive an interrupt with all corresponding
● DPRD_DAT instruction (Page 269): The S7-1200 CPU supports up to 64 bytes of
● DPWR_DAT instruction (Page 269): The S7-1200 CPU supports up to 64 bytes of
10.2.9

Diagnostic instructions

The following diagnostic instructions can be used with either PROFINET or PROFIBUS:
● GET_DIAG instruction (Page 285): You can read the diagnostic information from a
● DeviceStates instruction (Page 283): You can retrieve the operational states for a
● ModuleStates instruction (Page 284): You can retrieve the operational states for the
● LED instruction (Page 282): You can read the state of the LEDs for a distributed I/O
S7-1200 Programmable controller
System Manual, 11/2011, A5E02486680-05
a component.
to a PROFINET IO device component defined by ID.
information from a PROFINET IO device component and supply this information to its
output parameters.
consistent data. You must read consistent data areas greater than 64 bytes from a
PROFINET IO device with the DPRD_DAT instruction.
consistent data. You must write consistent data areas greater than 64 bytes to a
PROFINET IO device with the DPWR_DAT instruction.
specified device.
distributed I/O device within an I/O subsystem.
modules in a distributed I/O device.
device.
103BCommunication
10.2 PROFINET
441