Writing And Enabling Machine Data - Siemens S7-300 Operating Instructions Manual

Machine and cam data

9.2 Writing and enabling machine data

9.2 Writing and enabling machine data
General
Machine data are used to adapt the FM 352 to the axis and encoder.
Machine data are stored in the parameter DB at addresses 3.1 to 104.0.
Initial parameter assignment
If the module does not yet contain machine data (checkback signal PARA = 0), follow these
steps to initially assign parameters without the parameter assignment interface:
1. Enter the new values in the parameter DB.
2. Download the parameter DB to the CPU.
3. Set the following trigger bit in the channel DB:
4. Call FB CAM_CTRL in the cyclic user program.
Modifying machine data
To modify existing machine data (checkback signal PARA = 1) by means of the user
program:
1. Enter the new values in the parameter DB.
2. Set the trigger bits at the channel DB:
3. Call FB CAM_CTRL in the cyclic user program.
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– Write machine data (MDWR_EN)
– Write machine data (MDWR_EN)
– Enable machine data (MD_EN)
FM 352 electronic cam controller
Operating Instructions, 05/2011, A5E01071724-03