Siemens SINUMERIK 840C Installation Instructions Manual page 62

3 PLC Installation
3.5.4 PLC status
Example of operation
1) Actuation of the DD softkey selects data words from DB10 and DB11, e.g. DW5 in DB10 and in DB11.
3-12
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INPUT:
RECALL:
S
Reading input, output and flag words
Softkey: IW, QW, FW
Keys
S
Reading data words
Softkey DB
Softkey DX
Preselect DB (DX) with
Preselect data word with DB
Preselect data words from two contiguous DBs (DXs) with DD
Example:
Selecting DW 5 in DB 10
PLC Status softkey
DW softkey
Keys
Softkey DW 1)
Keys
S
Reading the contents of timers and counters
Softkey: T or C
Keys
The time is always displayed in seconds, regardless of how it was program-
med in STEP 5. The count is displayed in BCD code.
Display formats
KM: Binary
KH: Hexadecimal
KF: Fixed-point
KT: Time
KZ: Count
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Enter new value for the selected word or bit
Return to preceding display
+ +
to select a DB
to select a DX
+ +
+ to preselect word no. 5
+ Preselect timer or counter number 6
numbers 0 and 1
numbers 0 to F
numbers 0 to 9
numbers 0.01 to 999
numbers 0 to 999

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09.95
Preselect word
number 14
to select DB 10
SINUMERIK 840C (IA)