09.95
Siemens AG 2001 All Rights Reserved 6FC5197–jAA50

3-12

SINUMERIK 840C (IA)
INPUT: Enter new value for the selected word or bit
RECALL: Return to preceding display
Example of operation SReading input, output and flag words
Softkey: IW, QW, FW
Keys Preselect word
number 14
++
SReading data words
Softkey DB to select a DB
Softkey DX to select a 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 to select DB 10++
Softkey DW 1)
Keys to preselect word no. 5+
SReading the contents of timers and counters
Softkey: T or C
Keys Preselect timer or counter number 6+
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 numbers 0 and 1
KH: Hexadecimal numbers 0 to F
KF: Fixed-point numbers 0 to 9
KT: Time numbers 0.01 to 999
KZ: Count numbers 0 to 999
3 PLC Installation
3.5.4 PLC status
1) Actuation of the DD softkey selects data words from DB10 and DB11, e.g. DW5 in DB10 and in DB11.