Siemens CPU 315-2 DP Reference Manual

CPU 31x-2 as DP Master/DP Slave and Direct Communication
2-33
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
2.8 Diagnosis with Direct Communication
Diagnostic Addresses
With direct communication you allocate a diagnostic address on the receiver:
PROFIBUS
CPU 31x-2 as ReceiverCPU 31x-2 as Sender
Diagnostic address
During configuration you define in the
receiver a diagnostic address that is
allocated to the sender.
The receiver receives information on the
status of the sender or on a bus
interruption via this diagnostic address
(see also Table 2-15).
Figure 2-11 Diagnostic address for receiver with direct communication
Event Detection
Table 2-15 shows how a CPU 31x-2 operating as receiver recognizes data
transmission errors.
Table 2-15 Event Detection by CPU 31x-2 Acting as Receiver in Direct Communication
Event
What Happens in the Receiver
Bus
interruption<FJ>(short-
circuit, plug
disconnected)
 OB 86 is called and a station failure reported
(incoming event; diagnostic address of the receiver, assigned
to the sender)
 on peripheral access: Call of OB 122 <FJ>(Peripheral access
error)

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