3
03.96
3.3 Connection of a 2nd MCP/customer OPI and/or 1 HHU (up to SW 3.1)
3-45
Siemens AG 2000 All Rights Reserved
SINUMERIK 840D Installation and Start-Up Guide (IAD) – 04.00 Edition
3.3.2 Connection to MPI bus
The following features are examples of deviations from the standard configura-
tion:
S Additional connection of a handheld unit (HHU)
In this case, you must adjust the communication parameters and possibly the
switch settings (addresses) of the bus nodes.
You must use the STEP7 “Communication Configuration” tool to input a new
configuration. The following description of how to proceed is based on the as-
sumption that you already know how to use this tool.
1. Set up a new project and CPU programs with the STEP7 tool. You must set
up a CPU program for each component in the installation (PLC, HHU, etc.)
which is linked via the MPI.
2. Network MPI nodes, i.e. network CPU programs with MPI address.
3. Call STEP7 “Communication Configuration” tool and enter the desired con-
figuration.
4. Compile this configuration. A new SDB210 is generated for each CPU pro-
gram. The SDB210 for the HHU component is meaningless since the GD
parameters are set by means of DIP switch or keyboard.
5. Set the cyclical transmit pattern. Once the configuration has been compiled
successfully for the first time, the “Reduction ratio” and “Status” can be acti-
vated and then input.
6. Compile your configuration again.
7. Transfer the SDB210 (from the CPU program of the PLC) to the PLC.
Note
By default, the STEP7 project manager (S7 TOP) does not display the SDBs.
The SDB display is activated in the View / Set filter menu “All modules with
SDBs”.
8. Make the device-specific settings for all nodes:
You now need to set the GD identifiers from the “Communication Configura-
tion” table for the components (HHU, etc.).
9. Call FB1, DB7 must be parameterized for all operator control components
(MCP, HHU) in OB 100 in the basic PLC program.
10. You must configure the status pointer (double word) for the HHU in FB1 for
monitoring purposes.
See example in Section 3.3.3.
Note
For a description of the “Communication Configuration” tool and its applica-
tions, please refer to
References: /S7HT/ SIMATIC Step7 Manual, Start-up of MPI
Bus Nodes
Example
Procedure
3 Settin
s, MPI / OPI
To Next Page
Loading...
Need help?
General
