Siemens SINUMERIK 828D - Page 1664

Z1: NC/PLC interface signals
19.5 Help function output to PLC (H2)
Basic Functions
1664 Function Manual, 09/2011, 6FC5397-0BP40-2BA0
DB21, ...
DBB118 T function 1
Edge evaluation: No Signal(s) updated: job-controlled by NCK
Signal state 1 or
edge change
0 → 1
The T function programmed in an NC block is made available here
as soon as the T change signal is available.
Value range of T functions: 0 to 99 999 999; integer number
The T function remains valid until it is overwritten by a new T function.
Signal state 0 or
edge change
1 → 0
• After the PLC has ramped-up.
• All help functions are deleted before a new function is entered.
Application
example(s)
Control of automatic tool selection.
Special cases,
errors, ......
With T0, the current tool is removed from the tool holder but not replaced by a new tool (default
configuration of the machine manufacturer).
Remark 8 decade T numbers are only available as T function 1.
DB21, ...
DBB129 D function 1
Edge evaluation: No Signal(s) updated: job-controlled by NCK
Signal state 1 or
edge change
0 → 1
The D function programmed in an NC block is made available here
as soon as the D change signal is available.
Value range of D functions: 0 to 999; integer number
The D function remains valid until it is overwritten by a new D function.
Signal state 0 or
edge change
1 → 0
• After the PLC has ramped-up.
• All help functions are deleted before a new function is entered.
Application
example(s)
Implementation of protective functions.
Special cases,
errors, ......
D0 is reserved for deselecting the current tool offset.
DB21, ...
DBB140 - DBB157
H functions 1 to 3
Extended address H functions 1 to 3
Edge evaluation: No Signal(s) updated: job-controlled by NCK
Signal state 1 or
edge change
0 → 1
Up to 3 H functions programmed in an NC block are made available here simultaneously as soon as
the H change signals are available.
Value range of the H function: Floating point (corresponding to the MC5+format)
Value range of the extended address: 0 to 99; integer number
The H functions remain valid until they are overwritten by new H functions.
Signal state 0 or
edge change
1 → 0
• After the PLC has ramped-up.
• All help functions are deleted before a new function is entered.
Application
example(s)
Switching functions on the machine.