Siemens SIMATIC S7-1200 System Manual page 1346

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15.14 Downloading in RUN mode

Instructions that might fail due to "Download in RUN mode"

The following instructions might experience a temporary error when download in run

changes are being activated in the CPU. The error occurs when the instruction is initiated

while the CPU is preparing to activate the downloaded changes. During this time, the CPU

suspends initiation of user-program access to the Load Memory, while it completes in-

progress user-program access to Load Memory. This is done so that downloaded changes

can be activated consistently.

DataLogCreate

DataLogWrite

DataLogClose

DataLogNewFile

DataLogClear

DataLogDelete

In all cases the RLO output from the instruction will be false when the error occurs. The error

is temporary. If it occurs, the instruction should be retried later.

You must not retry the operation in the current execution of the OB.

Response while Activation is Pending

STATUS = W#16#80C0, ERROR = TRUE

RET_VAL = W#16#82C0

RET_VAL = W#16#80C0

RET_VAL = 0x80C0

S7-1200 Programmable controller

System Manual, V4.2, 09/2016, A5E02486680-AK