Functions Of Control; External Buttons "Start - HEIDENHAIN TNC 151 Q Mounting Instructions

3. Functions of control inputs / outputs
3.1 External buttons "Start", "Stop" and "Rapid traverse"
The external buttons "Start" and "Stop" are used for starting or interrupting program run or a positioning
procedure.
Button PLC-Allocation TNC 151 B/TNC 155 13 TNC 151 Q/TNC 155 Q
Multipoint connector
Multipoint connector
PLC-Power board
Start
E22 J 512 J 5/l
stop E23 J 5/l
J 6112
Rapid traverse E21 J 513 J 512
The required push-buttons for "Stop" (opener) and "Start" as well as "rapid traverse" (closer) are incorporated
into the machine pendant or console by the machine tool manufacturer.
Depending on the programming of machine parameter 74, the function of the "rapid traverse" button overrides
all other programmed speeds i.e. on pressing the "rapid traverse" button, the machine moves in rapid traverse
regardless of any lower programmed feed rate.
It is left to -the discretion of the machine tool manufacturer as to whether a "rapid traverse" button is to be
fitted. A "rapid traverse" can be programmed directly into the TNC 150 via keyboard-entry
("rapid traverse" = 15999 mm/min
or 6299 inch/min.)
10
3.2 External switch "Manual traverse" in conjunction with X, Y, 2, IV-axis-release
In/Output PLC-Allocation
TNC 151 B/TNC 155 E! TNC 151 Q/TNC 155 Q
Multipoint connector
Multipoint connector
PLC-Power board
"Manual traverse"
El9 J 515
J 514
Axis release X
A0 J l/l J l/l
Axis release Y Al
J II2
J II2
Axis release Z A2 J I/3
J l/3
Axis release IV
A3 J II4 J l/4
The axis release relays X, Y, Z and IV close after pressing the start button for the reference point approach
routine according to the sequence programmed in parameter 59. The axis release relays remain permanently
closed after crossing the reference marks so that the machine is kept in a closed loop condition by the control.
Exception:
In all operating modes, the axis release contacts are opened by providing + 24 volts control voltage at input for
"Manual traverse" e.g. with traverse of machine in conventional mode with mechanical handwheels.
The positioning loop is closed again if,
.a feed command is output by the control (only for the duration of the feed command) or
.the 24 V is taken off at the input "manual feed"
Transfer of actual position data when opening the positioning loops
With the standard PLC-program as of program number 234 601 03, it can be programmed via machine
parameter 158 (setting of markers) as to whether the transfer of actual position data as nominal positions
data should take place via the "manual traverse" input
With the entry value 16 384 in machine parameter 158 transfer is initiated. Since the machine parameter
can be used to activate various functions, the entry values will have to be added if necessary.
Clamping of axes:
Machines, on which axes could move out of position when the closed loop is off, must be fitted with a clamping
facility.
Please note :
Clamped axes are indicated in the display by a decimal point which suffixes the axis designation.
11