HEIDENHAIN TNC 306 Technical Manual - Manual (Page 308)

7-18
TNC 416/TNC 406/TNC 306 Program creation 3/2000
2.4
Timers and counters
2.4.1 Timers
There are 48 timers available in the PLC. These timers are controlled by special markers with the
symbol T. The time period for the timers is defined in the machine parameter MP4110.X. The time
unit corresponds to the PLC cycle time.
The timers are started by setting markers T0 to T47 which also sets them to the value from
MP4110.X. This activation may only be performed for a single PLC run, as otherwise the timers will
be restarted upon every succeeding run.
The markers T48 to T95 (timer running) will remain set for the period defined in the machine
parameters.
Example:
Start of Timer 1
Period in MP4110.1 = 9 (PLC-cycles)
T1
T49