
Position of the IM 151-7 CPU in the CPU Range
12-2
ET 200S IM 151-7 CPU Interface Module
A5E00058783-04
12.1 Differences to selected S7-300 CPUs
The following table lists the most important programming differences between two
selected CPUs of the S7-300 SIMATIC family and the IM 151-7 CPU.
Table 12-1 Differences to selected S7-300 CPUs
Features CPU 315-2 DP CPU 315-2 DP IM 151-7 CPU
(modular)
(6ES7 151-7Ax00-
0AB0)
(6ES7 151-7AA10-
0AB0)
Real-time clock Hardware Hardware Software Hardware
Memory backup Yes, with bat-
tery
Guaranteed by
MMC (mainte-
nance-free)
Not possible Guaranteed by
MMC (mainte-
nance-free)
Memory card Memory card MMC MMC MMC
Number of connections to
PD and OP
4
(as of 10/99:
12)
16 5 Max. 12
Setting the PROFIBUS
address
Hardware con-
figuration
Hardware con-
figuration
Hardware
configuration
must match
address setter
Hardware con-
figuration
Transmission rate to PD
and OP
187.5 kbaud
(MPI)
12 Mbaud
(DP)
187.5 kbaud
(MPI)
12 Mbaud
(DP)
12 Mbaud
(DP)
12 Mbaud
(MPI/DP)
Communication:
PD/OP
Global data comm.
S7 basic comm.
S7 comm.
Direct communication
Yes
Yes
Yes
Yes (server)
Yes
Yes
Yes
Yes
Yes (server)
Yes
Yes
No
Yes (server)
Yes (server)
Yes
Yes
Yes
Yes
Yes (server)
Yes
Range of uses with DP As a DP mas-
ter
As a DP slave
Stand-alone
As a DP mas-
ter
As a DP slave
Stand-alone
As a DP slave
Stand-alone
As a DP slave
Stand-alone
As the DP
master
(with the DP
mas-
ter module)
Addressing Free Free Free Free
Interrupt response time 0.4-1.3 ms 0.3-1.2 ms Less than
20 ms
Less than
20 ms
Removal/insertion of mod-
ules during operation
No No Yes Yes
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