HEIDENHAIN TNC 306 Service Manual - Manual (Page 85)

SERVICE MANUAL TNC 306/360
Page 78
HEIDENHAIN Service
17.2.2 PLC-Outputs
The PLC outputs are tested as follows:
a) Connect the test unit between LE and PLC or between PL and PLC.
b) Set the TNC as follows:
Press key Function
MOD activate auxiliary mode "MOD"
or press key repeatedly, until the dialog CODE NUMBER=
is displayed
8 0 7 6 6 7
enter code number
ENT acitvate PLC-mode
or select item TABLE I/O/C/T/M
ENT acitvate item
Now, a table is displayed on the screen. Press
ENT
until the table OUTPUT is displayed.
The logic states of the outputs are displayed on the screen. The states of the screen must
correspond to those of the test unit. If there is a difference, check the connecting cable for
short circuit and measure the output current of this output at the interface (max. 100 mA
for the LE, max. 1.2 A for PL outputs). If the output current is not exceeded and the
connecting cable is in order, the output board is probably defective. (O0 to O30 PLC-board,
O32 to O62 I/O-board PL 400)
END END
exit PLC mode
*
Note:
Always switch off the main switch, when engaging or disengaging any
connectors.