Functions of the IM 151-7 CPU
8-37
ET 200S IM 151-7 CPU Interface Module
A5E00058783-04
GD resources
The table below shows the GD resources of the IM 151-7 CPU.
Table 8-15 GD resources of the IM 151-7 CPU
Parameters
IM 151-7 CPU
Number of GD circles per CPU Max. 4
Number of transmit GD packets per GD circle Max. 1
Number of transmit GD packets for all GD circles Max. 4
Number of receive GD packets per GD circle Max. 1
Number of receive GD packets for all GD circles Max. 4
Data length per GD packet Max. 22 bytes
Consistency Max. 22 bytes
Scan rate (default) 1 to 255 (8)
Routing
By means of an IM 151-7 CPU configured as a master and with STEP 7 as of V5.2
+ Service Pack 1, you can reach S7 stations across different subnetworks (MPI
interface / PROFIBUS-DP interface) using a PD/PC.
For example, you can load user programs or a hardware configuration or perform
testing and commissioning functions.
Note
If you use the your CPU as an I slave, the routing function can only be used when
the DP interface is active.
Activate the Commissioning/Test Mode checkbox in the DP interface properties in
STEP 7 (see Section 4.1).
Detailed information can be found in the Programming with STEP 7 manual or
directly in the STEP 7 Online Help.
More detailed information
More detailed information on SFCs can be found in the Instruction list, in the
STEP 7 Online Help or in the System and Standard Functions Reference
Manual.
More detailed information on communication can be found in the
Communication with SIMATIC manual.
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