Application and properties
1.4 Requirements for operation
CM 1243-5
Operating Instructions, 04/2011, C79000-G8976-C246-01
9
Characteristic data of the DP interface of the CM 1243-5
● Number of DP slaves operable with a DP master: Maximum 16 *
)
● Total number of operable slots: Maximum 256
Any distribution of the slots as I slots and Q slots is permitted.
● Size of the DP data areas of the DP master: Max. 1024 bytes
– Input area of the DP master in total: Max. 512 bytes
– Output area of the DP master in total: Max. 512 bytes
● Maximum size of the DP data areas of the DP slaves
– Input area per DP slave: Max. 244 bytes
– Output area per DP slave: Max. 244 bytes
– Diagnostics data area per DP slave: Max. 244 bytes
NOTICE
*
)
Maximum 16 DP slaves per station
For the constellation STEP 7 V11.0 and CPU firmware V2.0, resources are available
for a maximum 16 DP slaves in total per station.
If you plug in a master module (CM 1243-5) and 1 or 2 slave modules (CM 1242-5) in
a station at the same time, the maximum number of slaves that can be operated with
the CM 1243-5 reduces by the CM 1242-5 modules plugged into the same station.
The number of DP slaves that can be operated with the DP master is therefore
reduced to 15 or 14.
Characteristic data of S7 communication
● Number of possible connections for S7 communication in total: 8
Of which maximum:
– Configured connections for PUT/GET services: 4
– PG connections: 1
– OP connections: 3
● User data per frame
– PUT: Max. 209 bytes
– GET: Max. 222 bytes
1.4 Requirements for operation
Configuration tool
To configure the module, the following configuration tool is required:
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