Siemens CPU 315-2 DP Hardware And Installation Guide

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S7-300 Automation System, Hardware and Installation: CPU 31xC and CPU 31x
13-2 A5E00105492-03
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Chassis ground is the totality of all the interconnected passive parts of a piece of
equipment on which dangerous fault-voltage cannot occur.
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Memory bit which can be used to generate clock pulses in the user program
(1 byte per memory bit).
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Note in the case of S7-300 CPUs that the clock memory byte is not overwritten in
the user program.
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A SIMATIC S7 code block contains part of the 67(3 user program. (In contrast:
a Æ Data Block (DB) only contains data.)
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Communication processors are modules for point-to-point and bus communication.
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The programming device online function “Compress” is used to align all valid
blocks contiguously in the RAM of the CPU at the start of the user memory. This
eliminates all gaps which arose when blocks were deleted or modified.
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Assignment of modules to racks/slots and (e.g. for signal modules) addresses.
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Data whose contents are related and which should not be separated are known as
consistent data.
For example, the values of analog modules must always be handled consistently,
that is the value of an analog module must not be corrupted by reading it out at two
different times.
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Counters are part of CPU --> system memory. The content of "Counter cells" can
be modified by 67(3 instructions (e.g. up/down count).

Siemens CPU 315-2 DP Specifications

General

Memory	64 KB
Power Supply	24 V DC
Order Number	6ES7 315-2AG10-0AB0
Number of DP Masters	1
Number of DP Slaves	124
Load Memory	64 KB
Number of Timers	256
Number of Counters	256
Data Memory	64 KB
Operating Temperature	0 to 60 °C
Integrated Interfaces	MPI, DP
Digital Outputs	Not integrated
Analog Inputs	Not integrated
Analog Outputs	Not integrated
Programming Languages	LAD, FBD, STL
Digital Inputs	Not integrated
Weight	660 g