Hello everyone, I have a cam generation program that works fine in the D425-2 V5.1 controller but does not work in the D445-1 V4.3 controller and generates a 40008 error. The outline of the cam has been generated. But the offset is not in effect. 

The error of the LCamHdl is 400C and the errorinfo is 21.

Technology Team

Hello,

please check why the offset was not considered.

2.3.6 Error numbers

LCAMHDL_ERR_ INTERPOLATE_CAM     400C

System command _interpolateCam was interrupted by an error. The return value of the system command can be found in errorInfo.

For return value 21 please refer to chapter 4.

4 Continuity check and correction

A function with assigned parameters can be checked for continuity in the definition range and value range, and possible points of discontinuity can be corrected. During this process, the points of discontinuity are examined separately for the definition range and value range, and are rated for one of the following corrective actions:

...............

https://support.industry.siemens.com/cs/ww/en/view/105644659

 I apologize for continuing this thread after 3 years, I have no way of knowing why the offset didn't take effect. I tried using the L_Cam library and it works fine with version 4.3 of the D445-1.

So I'm guessing that there is a problem with LCamHdl library support for firmware version 4.3.

I recently tried the latest version of LCamHdl on a D445-1 and still have the same problem.

Technology Team

Hello,

offset is not part of the LcamHdl-block. This block generates a cam disk.

For an offset please use the commands in Scout.

Please search for offset in the manual:

Motion Control TO Synchronous Operation, Cam

https://support.industry.siemens.com/cs/ww/en/view/109818984

 Offset is the part of the LcamHdl-block, the sLCamHdlCamProfileType structure contains the r64MasterShift and r64SlaveShift.

Technology Team

Hello,

startposition and endposition of the cam are different.

Please check "eCamMode".   "CYCLIC_ABSOLUTE" could be the problem.

EnumCamMode:

NO_CONSTRAINTS: not continuous in the edge points 
CYCLIC_ABSOLUTE: constant position in the edge points With 
CYCLIC_RELATIVE: constant speed in the edge points 

  "sCamProfile.eCamMode           := CYCLIC_RELATIVE;" in the program.

This problem does not occur frequently.

It usually occurs when the equipment is powered on for the first time.

More than 20 CAMs are used in the equipment.

Calling this library in background task for these CAM.

By the way, there is a low probability that the SIMOTION will enter a background task timeout and cause SIMOTION to enter a STOP state at power-up.

I declared a global variable of type DINT in my programme, and accumulated this variable one by one in all the background tasks of the programme until the value equals 600000. I found that when SIMOTION goes to STOP, the value of this variable is indicated between 2 programs that call the LcamHld library.

So does the code in this library cause SIMOTION to enter the background task timeout in special cases?