Detailed description
2.1 Key PLC CPU data for 810D, 840D and 840Di
Power Line Basic PLC Program (P3)
2-4 Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
Types of control: 840Di and 840D
Key CPU data
840Di 840D
PLC CPU
MLFB
Integrated PLC 317-2DP
master/slave
6FC5 317-2AJ10-0AB0
Integrated PLC 317-2DP
master/slave
6FC5 317-2AJ10-1AB0
Memory for user
and basic program
128 to 768 KB 128 to 768 KB
Data block memory Max. 256 KB Max. 256 KB
Memory submodule no no
Bit memories 32768 32768
Timers 512 512
Counters 512 512
Clock memories 8 8
Program/data blocks:
OB
FB
FC
DB
10, 20-21, 32-35, 40, 55-57,
80, 82, 85-87, 100,
121-122
0-2048
0-2048
1-2048
10, 20-21, 32-35, 40, 55-57,
80, 82, 85-87,100,
121-122
0-2048
0-2048
1-2048
Max. length of data block 32 KB 32 KB
Max. block length FC, FB 64 KB 64 KB
Inputs/outputs 1)
(address capacity in bytes):
- digital / - analog
- incl. reserved area
- process image
4096/4096
8192/8192
256/256
4096/4096
8192/8192
256/256
Inputs/outputs 2)
(addressing):
- digital
- analog
Through optional configuring
of I/O devices:
from I/O byte 0 onwards
from PI/PO byte 272
onwards (PROFIBUS only)
Through optional configuring
of I/O devices:
from I/O byte 0 onwards
from PI/PO byte 272
onwards
Processing time:
- Bit commands (I/O)
- Word commands
≤ 0.031 ms/kA
0.1 ms/kA
≤ 0.103 ms/kA
0.1 ms/kA
PDIAG (Alarm S,SQ) Yes Yes
PROFIBUS Master/Slave Master/Slave
No. of PROFIBUS slaves max. 125 max. 125
Max. number of PROFIBUS
slots
512 512
DP master system: DP 1 1
DP master system: MPI/DP 2 N/A