Siemens SIMATIC S7-300 Series Reference Manual page 89

DP Master
S
Services
– Equidistance Yes
– SYNC/FREEZE Yes
– Activation/deactivat Yes
ion of DP slaves
S
Transmission rates Up to 12 Mbps
S
Address area max. 2 KB I/2 KB O
S
User data per DP slave max. 244 bytes I and
244 bytes O
DP Slave
S
Services
– Status/Modify; Yes, can be activated
Program; Routing
S
Device master file siem807f.gsg
S
Transmission rate Up to 12 Mbps
S
Transfer memory 244 bytes I/244 bytes O
2. Interface
Functionality
S
DP Master Yes
S
DP Slave Yes
– Status/Modify; Yes, can be activated
Program; Routing
S
Direct data exchange Yes
S
PtP Connection No
S
Default setting None
S
Galvanically isolated Yes
Number of connections max. 16
– Of these, the 1 PD connection
following are
1 OP connection
reserved:
DP Master
S
Services
– PD/OP Yes
communication
– Equidistance Yes
– SYNC/FREEZE Yes
– Activation/deactivat Yes
ion of DP slaves
S
Transmission rates Up to 12 Mbps
S
Number of DP slaves max. 125
S
Address area max. 8 KB I/8 KB O
S
User data per DP slave max. 244 bytes I and
244 bytes O
PLC S7-300, CPU Specifications CPU 312 IFM to CPU 318-2 DP
A5E00111190-01
DP Slave
S
Services
– Status/Modify; Yes, can be activated
Program;
Routing
S
GSD file siem807f.gsg
S
Transmission speed Up to 12 Mbps
S
Transfer memory
244 bytes I/244 bytes O
Dimensions
Assembly dimension 160 125 130
B H T (mm)
Weight Approx. 0.93 kg
Programming
Programming language STEP 7
Stored instructions See Instruction List
Nesting levels 16
System functions (SFCs) See Instruction List
System function blocks See Instruction List
(SFBs)
User program security Password protection
Voltages, Currents
Power supply 24V DC
S
Permissible range 20.4 V to 28.8 V
Current consumption (idle) typical 1.2 A
Inrush current typical 8A
2
l t 0.4 A
External fusing for supply Circuit breaker; 2 A,
lines (recommendation)
Type B or C
PD supply at MPI (15 to max. 200 mA
30V DC)
Power losses typical 12 W
Battery Yes
S
Backup margin at 25_ min. 1 year
C and continuous CPU
buffering
S
Battery shelf life at approx. 5 years
25_C
Accumulator Yes
S
Clock back-up period
– at 0 to 25_C Approx. 4 weeks
– at 40_ C Approx. 3 weeks
at 60 _ C
– Approx. 1 week
S
Battery charging time Approx. 1 hour
CPUs
2
s
1-73