Behavior At Cpu-Master-Stop - Siemens SIMATIC ET 200S Operating Instructions Manual

5.4.12

Behavior at CPU-Master-STOP

Definition
You can configure the reaction of the 2PULSE to failure of the higher-level controller for the
two channels together.
Response to CPU/master STOP Channel-specific response and status of the 2PULSE
Turn off DO
Continue operating mode
DO substitute a value
DO keeps last value
Startup
To start a new output sequence after CPU/master STOP and a set ACK_SW_ENABLE, first
delete SW_ENABLE. Keep deleting until ACK_SW_ENABLE is also deleted.
If the mode is to continue during a change from CPU-/Master-STOP to RUN (startup), the
CPU/Master cannot clear the outputs. Possible solution: In the part of the user program that
is executed during startup, set the "Software enable" (SW_ENABLE = 1) control bit.
Modified Parameter Assignment
The status assumed by the 2PULSE at CPU/master STOP remains even in the case of
parameter assignment or configuration of the ET 200S station. This occurs, for example, at
POWER ON of the CPU/master or the IM 151 or at the resumption of DP transfer.
In "Continue working mode", however, and after loading changed parameters or
configuration of the ET 200S station to the CPU/master, the 2PULSE terminates the
process. As a result, the 2PULSE does the following:
● Deletes the DO digital output.
● Deletes STS_ENABLE and
● Terminates the current output sequence.
Technological Functions
Operating Instructions, 06/2010, A5E00124867-07
Delete the DO digital output
Delete STS_ENABLE and
Terminate the current output sequence
The DO digital output remains unchanged
STS_ENABLE remains unchanged and
The current output sequence is continued
Output of the channel-specific, substitute value that has been assigned parameters of
the DO digital output
Delete STS_ENABLE and
Terminate the current output sequence
The DO digital output remains unchanged
Delete STS_ENABLE and
Terminate the current output sequence
2PULSE
5.4 Modes and Functions
317