Siemens TIM 1531 IRC, Руководство по эксплуатации

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Block library TeleControl ST7
5.6 Types
TIM 1531 IRC
Operating Instructions, 02/2018, C79000-G8976-C468-02
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If, however, you do not want the CPU to change to STOP if there is a missing block or only
changes to STOP when certain block types or block numbers are missing, you can specify
the reaction you require in OB121.
Even if you have loaded OB121 as an empty block on the CPU, this is enough to have the
CPU continue running if a block is missing. If you want to decide more selectively when the
CPU should continue running or change to STOP, include OB121 in the user program.
In conjunction with SINAUT ST7 it is possible that a CPU changes to STOP when it receives
data from another CPU that it does not (or not yet) know. This is, for example, the case when
you add a data point typical to a station and give it a complete destination address
(destination subscriber no. plus destination object no.). The specified destination object no.
can lead to a stop on the destination subscriber in the following situation:
● As soon as you have installed a new data point typical in a station, the data is transferred
to the destination.
● If there is no corresponding receive typical installed on the destination CPU, the
destination object no. (= instance DB of the received typical) does not exist.
The result is that the CPU changes to STOP as soon as the data is received.
To avoid this it is advisable to call FC ST7ObjectTest in OB121.
Table 5- 2 Call of FC ST7ObjectTest in the programming error OB
OB121
ST7ObjectTest
Calling FC ST7ObjectTest in OB121 prevents a CPU STOP, if the CPU receives
data with an unknown destination object no.
Other calls can be included at any point in OB121 regardless of the FC
ST7ObjectTest call.
FC ST7ObjectTest has a parameter "StopInOtherCases". Here you can specify
what happens in other situations (STOP or continue running) if OB121 was
called because another data block or an FB or FC is missing.