Service manual

SERVICE MANUAL TNC 415B/425
Page 139
Issue: 20.08.95
Selecting the Operands and Starting the Logic Diagram
Press Key Function
A table is displayed from which the operands can be selected. The control requests the positions of the table in
a dialogue. Wrong inputs can be cleared by pressing DEL. It is possible to enter a trigger condition for each
operand. 512 states are traced before and after a trigger event. The following trigger conditions are possible:
"1" ⇒ trace if the operand is a logical "1"
(trigger on positive edge)
"0" ⇒ trace if the operand is a logical "0"
(trigger on negative edge)
NO
ENT
⇒ no trigger
If no trigger condition is entered for any of the operands, the operand states are traced
continuously and the last 1024 states are stored.
e.g.: 0 I5 1 ⇒ trigger on positive edge
1O6 0⇒ trigger on negative edge
2 M2003 ⇒ no trigger
Start TRACE function
TNC in operating mode "MACHINE" (key on VDU)
The trace function is started with START TRACE; END TRACE or a trigger event terminate the tracing.
PCTR blinking : trigger condition has not occurred yet
PCTR on : trigger condition has occurred; write access to buffer memory
PCTR off : buffer memory is full; LOGIC DIAGRAM can be called
Switch to TRACE mode
Call logic diagram