Parameter Declaration Data type Memory block Description
STATUS OUTPUT DWORD I, Q, M, D, L Call ID (bytes 2 and 3) or error code.
RECORD IN_OUT ANY I, Q, M, D, L Record set
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Chap. 14.2.22 ‘SFB 54 - RALRM - Receiving an interrupt from a periphery module’
page 777
14.2.22 SFB 54 - RALRM - Receiving an interrupt from a periphery module
14.2.22.1 Parameters
The SFB 54 RALRM interface is identical to the FB RALRM defined in the
standard "PROFIBUS Guideline PROFIBUS Communication and Proxy
Function Blocks according to IEC 61131-3".
The SFB 54 RALRM receives an interrupt with all corresponding information from a
peripheral module or a component of the corresponding bus slave and provides this infor-
mation to its output parameters. The information contained in the input parameters con-
tains the start information of the called OB as well as information from the interrupt
source. Call the SFB 54 only within the interrupt OB started by the CPU operating system
as a result of the peripheral interrupt that is to be examined.
If you call SFB 54 RALRM in an OB for which the start event was not trig-
gered by peripherals, the SFB supplies correspondingly reduced informa-
tion on its outputs.
Make sure to use different instance DBs when you call SFB 54 in dif-
ferent OBs. If you want to evaluate data that are the result of an SFB 54
call outside of the associated interrupt OB you should moreover use a
separate instance DP per OB start event.
Error information
Description
VIPA SPEED7
Integrated Standard
System Function Blocks > SFB 54 - RALRM - Receiving an interrupt from a periphery module
HB00 | OPL_SP7 | Operation list | en | 18-30 777
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