Graphical user interface (P-EXTV-00030 - P-EXTV-00037)

The graphical user interface has access to NC interfaces and NC data via so-called HMI objects. The access protocol is encapsulated in a DLL which offers a Windows application write/read access to HMI objects. Interface objects are created automatically according to the configuration list for the graphical user interface if this is configured accordingly for the variable.

Two objects are then created for each specified variable, one for write access and one for read access. This occurs independently of the access rights of the NC channel, i.e. even if the NC channel is only assigned read access to the variable (e.g. access_rights = READ_ONLY), the graphical user interface can still write to the variable. With an array, a GUI object is created for each array element.

If required, the name format of GUI objects can be adapted as required by specifying corresponding templates in the list (as of Version V254). In this case, the placeholder %s must be specified for the name followed by a placeholder %d for the array index.

Example: Assigning the name to the GUI

# ***************************************

#

# ***************************************

#

name_rd_global_array             cnc_test1_%s_rd[%d]

name_wr_global_array             cnc_test1_%s_wr[%d]

name_rd_channel                  mc_test2_%s_rd

name_wr_channel                  mc_test2_%s_wr

...

var[0].name                      G_ARRAY5

var[0].type                      SGN32

var[0].scope                     GLOBAL

var[0].synchronisation           FALSE

var[0].access_rights             READ_WRITE

var[0].array_size                5

var[0].create_hmi_interface TRUE # HMI object is created

#

var[1].name                      L_BOOLEAN

var[1].type                      BOOLEAN

var[1].scope                     CHANNEL

var[1].synchronisation           FALSE

var[1].access_rights             READ_WRITE

var[1].array_size                1

var[1].create_hmi_interface TRUE # HMI object is created

The following HMI objects are created from the above extract of the configuration list:

cnc_test1_G_ARRAY5_rd[0]

cnc_test1_G_ARRAY5_wr[0]

cnc_test1_G_ARRAY5_rd[1]

cnc_test1_G_ARRAY5_wr[1]

cnc_test1_G_ARRAY5_rd[2]

cnc_test1_G_ARRAY5_wr[2]

cnc_test1_G_ARRAY5_rd[3]

cnc_test1_G_ARRAY5_wr[3]

cnc_test1_G_ARRAY5_rd[4]

cnc_test1_G_ARRAY5_wr[4]

mc_test2_L_BOOLEAN_wr

mc_test2_L_BOOLEAN_rd