Siemens S7-300 - Writing and Enabling Machine Data

Machine and cam data
9.2 Writing and enabling machine data
FM 352 electronic cam controller
Operating Instructions, 05/2011, A5E01071724-03
69
4. Check to see if the revised machine data were transmitted and enabled successfully by
evaluating the done bit (_D ending) and error bit (_ERR ending) assigned to each job:
– "Write machine data" job completed (MDWR_D)
– "Enable machine data" job completed (MD_D)
– Error during "Write machine data" job (MDWR_ERR)
– Error during "Enable machine data" job (MD_ERR)
A job was completed without errors if done bit = 1 and error bit = 0 (refer to the section
entitled FB CAM_CTRL (FB 1) (Page 43)).
Set the done
and error bits of a job to 0 after evaluation.
Note
If any parameters relevant for synchronization were modified, the synchronization will be
canceled when the machine data are activated. This operation also resets your settings
and deletes all machine and cam data from the module.
Parameters relevant to synchronization:
 Axis type
 End of rotary axis
 Encoder type
 Distance per encoder revolution
 Increments per encoder revolution
 Number of revolutions
 Reference point coordinate
 Absolute encoder adjustment
 Type of reference point retriggering
 Direction adaptation
 Number of cams
 Software limit switch start and end
5. Always rewrite the cam data of the assigned cams, regardless if they have been changed
or not:
– Write cam data n, n = 1...8 (CAM1WR_EN...CAM8WR_EN).
6. Check to see if the cam data were transmitted successfully by evaluating the done bit (_D
ending) and error bit (_ERR ending) assigned to each job:
– "Write cam data n" job completed, n = 1...8 (CAM1WR_D...CAM8WR_D).
– Error in "Write cam data n" job, n = 1...8 (CAM1WR_ERR...CAM8WR_ERR).
A job was completed without errors if done bit = 1 and error bit = 0 (refer to the section
entitled FB CAM_CTRL (FB 1) (Page 43)).
Set the done
and error bits of a job to 0 after evaluation.