Chapter 1 Principles
Manual VIPA CPU 21x
1-6
HB103E - Rev. 05/45
Function security of the VIPA CPUs
The CPUs include security mechanisms like a Watchdog (100ms) and a
parameterizable cycle time surveillance (parameterizable min. 1ms) that
stop res. execute a RESET at the CPU in case of an error and set it into a
defined STOP state.
The VIPA CPUs are developed function secure and have the following
system properties:
Event
concerns
Effect
RUN
→
STOP
general
BASP (
B
efehls-
A
usgabe-
Sp
erre, i.e. command
output lock) is set.
central digital outputs
The outputs are set to 0V.
central analog outputs
The voltage supply for the output channels is
switched off.
decentral outputs
The outputs are set to 0V.
decentral inputs
The inputs are read constantly from the slave and
the recent values are put at disposal.
STOP
→
RUN
res. Power on
general
First the PII is deleted, the call of the OB100
follows. After the execution of the OB, the BASP is
set back and the cycle starts with:
Delete PIO
→
Read PII
→
OB1.
central analog outputs
The behavior of the outputs at restart can be
preset.
decentral inputs
The inputs are read constantly from the slave and
the recent values are put at disposal.
RUN
general
The program execution happens cyclically and can
therefore be foreseen:
Read PII
→
OB1
→
Write PIO.
PII: = Process image inputs
PIO: = Process image outputs
Summary of Contents for CPU 21 Series
Page 1: ...Manual VIPA CPU 21x Order No VIPA HB103E Rev 05 45 ...
Page 2: ...Lerrzeichen ...
Page 6: ...About this Manual Manual VIPA CPU 21x Subject to change to cater for technical progress ...
Page 10: ...Contents Manual VIPA CPU 21x iv HB103E Rev 05 45 ...
Page 30: ...Chapter 1 Principles Manual VIPA CPU 21x 1 18 HB103E Rev 05 45 ...
Page 58: ...Chapter 2 Hardware description Manual VIPA CPU 21x 2 28 HB103E Rev 05 45 ...
Page 80: ...Chapter 3 Deployment CPU 21x Manual VIPA CPU 21x 3 22 HB103E Rev 05 45 ...
Page 178: ...Chapter 5 Deployment CPU 21x 2BT02 with H1 TCP IP Manual VIPA CPU 21x 5 48 HB103E Rev 05 45 ...