Siemens SIMATIC S7-400 Reference Manual page 121

Programming
Programming language
Instruction set
Bracket levels
System functions (SFC)
Number of SFCs active at
the same time
•
WR_REC
•
WR_PARM
•
PARM_MOD
•
WR_DPARM
•
DPNRM_DG
•
RDSYSST
•
DP_TOPOL
System function blocks
(SFB)
Number of SFBs active at
the same time
•
RD_REC
•
WR_REC
User program protection
Access to consistent data
in the process image
Clock synchronism
User data per clock
synchronous slave
Maximum number of bytes
and slaves in a process
image partition
Equidistance
Shortest clock pulse
CiR synchronization time
Base load
Time per I/O byte
Automation System S7-400 CPU Specifications
A5E00165965-01
LAD, FBD, STL, SCL
See instruction list
8
See instruction list
8
8
1
2
8
1 to 8
1
See instruction list
8
8
Password protection
Yes
Max. 128 bytes
The following applies:
Number of bytes / 100 +
number of slaves < 11
Yes
5 ms
2.5 ms without use of SFC
126, 127
100 ms
200 µs
Technical Specifications
Dimensions
Mounting dimensions
W×H×D (mm)
Slots required
Weight
Voltages, Currents
Current consumption from
S7-400 bus (5 VDC)
Current consumption from
the S7-400 bus (24 VDC)
The CPU does not
consume any current at
24 V, and it only makes this
voltage available at the
MPI/DP interface.
Backup current
maximum backup time
Incoming supply of external
backup voltage to the CPU
Power loss
25×290×219
1
Approx. 0.72 kg
Typ. 1.5 A
Max. 1.6 A
Total current consumption
of the components
connected to the MPI/DP
interfaces, with a maximum
of 150 mA per interface
Typ. 40 mA
Max. 300 mA
approx 356 days
5 VDC to 15 VDC
Typ. 7.5 W
4-5