Siemens SIMATIC S7-1200 - Page 1334

Online and diagnostic tools
15.13 Monitoring and modifying values in the CPU
S7-1200 Programmable controller
1334 System Manual, V4.2, 09/2016, A5E02486680-AK
Startup
RUN
A The clearing of the I memory area is not
affected by the Force function.
①
While writing Q memory to the physical out-
puts, the CPU applies the force value as the
outputs are updated.
B The initialization of the outputs values is
not affected by the Force function.
②
When reading the physical inputs, the CPU
applies the force values just prior to copying
the inputs into I memory.
C During the execution of the startup OBs,
the CPU applies the force value when
the user program accesses the physical
input.
③
During the execution of the user program
(program cycle OBs), the CPU applies the
force value when the user program accesses
the physical input or writes the physical out-
put.
D The storing of interrupt events into the
queue is not affected.
④
Handling of communication requests and self-
test diagnostics are not affected by the Force
function.
E The enabling of the writing to the out-
puts is not affected.
⑤
The p
rocessing of interrupts during any part of
the scan cycle is not affected.