PLC concepts
5.5 Using a memory card
S7-1200 Programmable controller
System Manual, V4.2, 09/2016, A5E02486680-AK
141
How the CPU evaluates the memory card
If you do not configure the CPU to "Disable copy from internal load memory to external load
memory" in the Protection properties of the device configuration (Page 212), the CPU
determines what type of memory card you inserted:
●
: A blank memory card does not have a job file (S7_JOB.S7S). If you
insert a blank memory card, the CPU adds a program job file. It then copies internal load
memory to external load memory (the program file on the memory card) and erases
internal load memory.
●
: A blank program card has a program job file that is empty. In this
case, the CPU copies internal load memory to external load memory (the program file on
the memory card) and erases internal load memory.
If you configured the CPU to "Disable copy from internal load memory to external load
memory" in the Protection properties of the device configuration, the CPU behaves as
follows:
●
: A blank memory card does not have a job file (S7_JOB.S7S). If you
insert a blank memory card, the CPU does nothing. It does not create a program job file
and it does not copy internal load memory to external load memory (the program file on
the memory card). It does not erase internal load memory.
●
: A blank program card has a program job file that is empty. In this
case, the CPU performs no action. It does not
copy internal load memory to external load
memory (the program file on the memory card). It does not erase internal load memory.
If you insert a program card (Page 145), transfer card (Page 142), or card that contains a
firmware update (Page 148)into the CPU, the configuration setting for "Disable copy from
internal load memory to external load memory" has no effect on how the CPU evaluates the
memory card.
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