Siemens sinumerik 840D sl Function Manual

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Detailed description2.6 Function-specific display dataSpecial functions: Retrace Support (TE7)30 Function Manual, 11/2006, 6FC5397-2BP10-2BA0ActivationActivation of the block search from the last main block is performed using the followingRESU-specific machine data:• MD62575 $MC_RESU_SPECIAL_FEATURE_MASK_2, bit 0 (additional RESU features)– Bit 0 = 0: Retrace support is performed using block search with calculation on contour– Bit 0 = 1: Retrace support is performed using block search from the last main blockBoundary conditionsIn order that a new retrace support operation can take place following a retrace supportoperation with block search from last main block, the RESU start CC_PREPRE(1) must beprogrammed in the retrace support ASUB CC_RESU_BS_ASUP.SPF:Example:PROC CC_RESU_BS_ASUP SAVE; (synchronized actions, M functions, etc. required for retrace support)CC_PREPRE(1)RMNREPOSAM172.6 Function-specific display data2.6.1 Channel-specific GUD variablesAs display data for the size of the block search buffer, RESU provides the following channel-specific GUD variables for HMI applications:• SINUMERIK HMI Advanced• SINUMERIK HMI EmbeddedTable 2-1 Channel-specific GUD variableGUD variable Name Value AccessCLC_RESU_LENGTH_BS_BUFFERSize of block search buffer Byte read onlyOnce the technological function has been started up successfully, the GUD variables listedare not displayed automatically on the HMI interface.