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4 Mode of Operation
4.5
FC “LHcs4x00_Diag86”
HCS4x00Library
Entry ID: 109478117, V2.2.1, 09/2018
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4.5.1
Program workflow
Figure 4-7
Start/Stop
i := 1
Delete all
diagnostic
information
Start/Stop
Incoming
event
yes
no
i <= numHcs
yes
no
Failure station
=
numHcs
yes
no
i := i+1
Start/Stop
Start/Stop
enable?
yes
no
Module rack failure OB 86 is called for each coming and going failure of an I/O
module.
When an HCS fails (incoming event), the enabled (“enable” = TRUE) FC
“LHcs4x00_Diag86” deletes all errors in the “diag” data buffer of the respective
HCS in DB “LHcs4x00_Get”.
This DB ensures that diagnostic interrupts are not displayed, if a heating control
system cannot be accessed from the CPU.