Siemens CPU 315-2 DP Reference Manual

CPUs
1-4
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
1.1.2 Mode Selector Switch
The mode selector is the same in all CPUs.
Mode Selector Positions
The positions of the mode selector are explained in the order in which they appear
on the CPU.
Details on CPU operating modes are found in the STEP 7 Online Help .
Position Description Description
RUN-P RUN-PROGRAM
mode
The CPU scans the user program.
The key cannot be taken out in this position.
RUN mode RUN mode The CPU scans the user program.
The user program cannot be changed without password
confirmation.
The key can be removed in this position to prevent anyone not
authorized to do so from changing the operating mode.
Stop mode Stop mode The CPU does not scan user programs.
The key can be removed in this position to prevent anyone not
authorized to do so from changing the operating mode.
MRES mode Memory reset Momentary-contact position of the mode selector for CPU memory
reset (or a cold start as well in the case of the 318-2).
Memory reset per mode selector switch requires a specific
sequence of operation.

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