315-4PN33

n Startup when expected/actual configuration differs: If the
checkbox for ‘Startup when expected/actual configuration differ’
is
deselected and at least one module is not located at its configured
slot or if another type of module is inserted there instead, then the
CPU does not switch to RUN mode and remains in STOP mode. If
the checkbox for ‘Startup when expected/actual configuration
differ’ is selected, then the CPU starts even if there are modules
not located in their configured slots of if another type of module is
inserted there instead, such as during an initial system start-up.
n Monitoring time for ready message by modules [100ms]: This
operation specifies the maximum time for the ready message of
every configured module after PowerON. If the modules do not
send a ready message to the CPU by the time the monitoring time
has expired, the actual configuration becomes unequal to the
preset configuration. Monitoring time for ready message by mod-
ules [100ms]
n Transfer of parameters to modules [100ms]: The maximum time
for the transfer of parameters to parameterizable modules. Here
connected PROFINET IO devices also considered until they are
parameterized. If not every module has been assigned parame-
ters by the time this monitoring time has expired; the actual con-
figuration becomes unequal to the preset configuration.
n Update OB1 process image cyclically: This parameter is not rele-
vant.
n Scan cycle monitoring time: Here the scan cycle monitoring time
in milliseconds may be set. If the scan cycle time exceeds the
scan cycle monitoring time, the CPU enters the STOP mode.
Possible reasons for exceeding the time are:
–
Communication processes
– a series of interrupt events
– an error in the CPU program
n Minimum scan cycle time: This parameter is not relevant.
n Scan cycle load from Communication: This parameter is not rele-
vant.
n Size of the process image input/output area: Here the size of the
process image max. 2048 for the input/output periphery may be
fixed.
n OB85 call up at I/O access error: The preset reaction of the CPU
may be changed to an I/O access error that occurs during the
update of the process image by the system. The VIPA CPU is
preset such that OB 85 is not called if an I/O access error occurs
and no entry is made in the diagnostic buffer either.
n Clock memory: Activate the check box if you want to use clock
memory and enter the number of the memory byte.
The selected memory byte cannot be used for temporary
data storage.
n Number of Memory bytes from MB0: Enter the number of retentive
memory bytes from memory byte 0 onwards.
n Number of S7 Timers from T0: Enter the number of retentive S7
timers from T0 onwards. Each S7 timer occupies 2bytes.
Startup
Cycle/Clock memory
Retentive Memory
VIPA System 300S Deployment CPU 315-4PN33
Setting standard CPU parameters > Parameters CPU
HB140 | CPU | 315-4PN33 | GB | 14-43 45