Ethernet communication
7.6 HT 8
Manual
212
Commissioning Manual, 05/2008, 6FC5397–4CP10–4BA0
(7) Displayed traversing keys
The traversing key inscription is displayed at the position of the vertical softkeys of the HMI
interface. The character strings for inscription are taken from MD 10000 or the HMI file
HT8_xx.INI.
(8) No machine axes and Axes 7 - n selected in WCS.
Both output signals can be used to stop the traversing of the machine axis in the active WCS
fully.
See also
Activate traversing keys (Page 212)
Display traversing keys (Page 214)
7.6.5.4
Activate traversing keys
A maximum of 6 machine axes can be traversed via the traversing keys of the HT 8. The
traversing key signals are located in the input data area under:
●
EB n + 2, Bit 0 - Bit 5 (positive traversing direction)
●
EB n + 3, Bit 0 - Bit 5 (negative traversing direction)
The FC 26 function is used to transfer the traversing key signals from the input data area to
the NC/PLC interface.
Configuration of the machine axes
For the machine axes on which the traversing key signals from the input ranges EB n + 2 /
EB n + 3, Bit 0 - Bit 5 (traversing keys +/-) are to act, the corresponding axis numbers m
(where m = 1, 2, ..., max. number of machine axes) must be entered in the following tables in
bytes:
●
Machine axis table, 1st MCP: DB10.DBB8 to DBB13 (Table of machine axis number)
●
Machine axis table, 2nd MCP: DB10.DBB32 to DBB37 (Table of machine axis number)
The lengths of the machine axis tables can be specified for FC 26 via the following
parameters:
●
Machine axis table, 1st MCP: DB10.DBB30 (upper limit of machine axis table)
●
Machine axis table, 2nd MCP: DB10.DBB54 (upper limit of machine axis table)
A value of e.g. 4 means that only the first four table entries or machine axes will be observed
by FC 26. The maximum value for FC 26 is 6. The maximum value is taken for value 0 or
values higher than 6.
The FC 26 function of the basic PLC program transfers the traversing key signals of the HT 8
to the axis-secific interfaces in DB31, ... DBX4.6 and DBX4.7 (traversi/-) of the
machine axes specified in the table.