Siemens SINUMERIK 840C Installation Instructions Manual page 1069

12 Functional Descriptions
12.28.8 Overview of function identifiers and configuring parameters (DB 2, DR 2 ... DR 6)
Explanation of NCK data (SW 5 and higher)
Function
Explanation
identifier
03 (SW 5 and
NCK data
higher)
Signal Name of the NCK signal
number
1 Axial feedrate
2 Path feedrate
3 Path distance-to-go
4 IKA input quantity A (type 21)
5 IKA input quantity B (type 27)
6 IKA output quantity (type 35)
7 IKA compensation value
8 IKA intermediate point number (type 35)
9 IKA table input A (type 22)
10 Axis setpoint
11 Number of predecoded blocks
12 CPU use
Configuration in PLC DB 2 is performed with the function identifier 03 and configuration
parameter 1=0.
This reading process can be executed either with or without acknowledgement. Operation
with acknowledgement means the next value is read only when the communication partner has
read the value.
In operation without acknowledgement, the values to be entered are refreshed in the timebase
as configured in DB2 in the parameter "Refresh rate".
_______
1) Unit GEO... geometry resolution
U... Unit
SP... Scan period
LR... Position control resolution
2) The data CPU use is displayed with double precision.
12–294
Max. permissible
Parameter 1
number
32 0
© Siemens AG 1992 All Rights Reserved
Parameter 2 Parameter 3
Signal
Axis number
number
Axis no. Channel/
IKA no.
1 - 30
--
-- 2(exp - 1) GEO*U
--
--
--
1 - 30
--
--
1 - 30
--
--
SINUMERIK 840C (IA)
07.97
Parameter 4
Channel/IKA
number
1)
Unit
2(exp - 1)
GEO*U/SP
2(exp - 17)
GEO*U/SP
--
--
--
LR
--
--
LR
--
--
6FC5197- AA50