HEIDENHAIN TNC 407 (243 020) Service Manual User Manual
Page 97
SERVICE MANUAL TNC
Issue:
01.09.1995
Page
81
17.2.2 PLC Outputs
Check the PLC outputs as follows:
Connect the test unit between LE and PLC or between LE and PL.
Set the TNC as follows:
Prepare TNC for code number input
Enter code number, acknowledge with ENT
Soft key
to display the tables
Soft key
to display the output table
Now the logic states of the outputs are displayed on the screen. The states of the screen display must
correspond to those of the test unit. If there is a difference, test the connecting cable for short circuit and
measure the output current at interface (max. 100
for LE outputs, 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
(00 to 030 of processor board, 032 to 062 of
board PL 400).
switch TNC back to operating
NOTE:
Always switch off the main switch before engaging or disengaging any connector.