Systemsoftware
System- and communication configuring D7-SYS - SIMADYN D
2-35
Edition 03.2001
Number of configurable interrupt tasks
8
Number of available interrupt sources, total
54 (SIMADYN D) or 19
(SIMATIC TDC)
Of which
Software interrupts
8
CPU timer interrupts
2
Interrupts for binary inputs
4
Bus interrupts (L/C)
2 (SIMADYN D) or 3
(SIMATIC TDC)
LE bus interrupt
4 (only SIMADYN D)
LE bus interrupt, extended
32 (only SIMADYN D)
Only T400 ISL, ISR
2
Table 2-11
Technical data of the interrupt task
The run times of the operating system are specified in the following,
based on the PM5 CPU module. For PM6 CPU modules, the computation
time is shortened to approximately one third of the specified times.
The signals, which are transferred along the L- and/or C bus represent an
almost consistent system load, as the bus is always clocked at 8 MHz.
The minimum time is shown in the following table which is required to
process each cycle of a task (refer above for the basis for the
calculations!):
Time to start
40 µs
Time to end
40 µs
Additional component for a local buffer
system
20 µs
C-bus buffer system
20 µs
L-bus buffer system
20 µs
Table 2-12
Computation times of the operating system
The code and data of the operating system are copied from the memory
module into the CPU RAM on the CPU module and the data is
„unzipped“. Memory requirements are as follows:
•
CPU-RAM area: 400 Kbyte
•
Memory module area: 200 Kbyte („zipped“)
On the communication buffer modules, the operating system after the
start uses 1 Kbyte of the C-bus- and the L-bus buffer memory as data
area to administer operating system lists. This is supplemented by the
appropriate memory requirement, depending on the configured software,
for the buffer system and additional components, e. g. communications.
Interrupt tasks
Computation times
of the operating
system
Memory
requirement of the
operating system