12 Functional Descriptions 07.97
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
identifier
Explanation
Max. permissible
number
Parameter 1 Parameter 2 Parameter 3 Parameter 4
03 (SW 5 and
higher)
NCK data 32 0
Signal
number
Axis number
Channel/IKA
number
Signal
number
Name of the NCK signal Axis no. Channel/
IKA no.
Unit
1)
1 Axial feedrate 1 - 30 2(exp - 1)
GEO*U/SP
2 Path feedrate -- 2(exp - 17)
GEO*U/SP
3 Path distance-to-go -- 2(exp - 1) GEO*U
4 IKA input quantity A (type 21) -- --
5 IKA input quantity B (type 27) -- --
6 IKA output quantity (type 35) -- --
7 IKA compensation value 1 - 30 LR
8 IKA intermediate point number (type 35) -- --
9 IKA table input A (type 22) -- --
10 Axis setpoint 1 - 30 LR
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
© Siemens AG 1992 All Rights Reserved 6FC5197- AA50
SINUMERIK 840C (IA)
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