Siemens SIMATIC S7-1500 System Manual page 102

Arrangement of the modules
The following table shows the slot number assignment:
Slot
0
1
2 - 31
Control data record
A control data record 196 containing a slot assignment is defined for the configuration
control.
Byte
0
1
2
3
4
5
:
4 + (max. slot number)
Control element
Each element of the control data record must contain the following information about the slot:
● Assignment of configured slot ⇔ real slot
Byte
Assignment of configured slot
(e.g. in byte 5)
S7-1500 Automation System
System Manual, 02/2014, A5E03461182-AB
Modules
Power supply module (optional)
CPU
I/O modules/system power supply
modules, depending on the configuration
version
Element
Block length
Block ID
Version
Version
Assignment of
configured slot 0
Assignment of
configured slot 1
:
Assignment of
configured maximum
slot
Bit
0 to 7
Remark
Before the CPU
Slot 1 is always the CPU
After the CPU
Code
4 + number of slots
196
4
(for central I/O)
0
Real slot 0
Real slot 1
(always 1, because
the CPU is always in
slot 1)
:
Real slot
Meaning
11111111: Module not present
00000000 up to maximum slot: Real slot
Flexible automation concepts
8.3 Configuration control
Explanation
Header
Control element
Describes in each
element which real
slot in the device is
assigned to the
configured slot.
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