HEIDENHAIN TNC 430 PA/M - Fast PLC Inputs

December 2001 Operands 7 – 21
7.2.5 Fast PLC Inputs
With MP4130 you can define PLC inputs that are not interrogated within the
PLC cycle (21 ms), but rather in the control loop cycle (3 ms). Markers M4590
to M4593 show the current state of the fast PLC inputs.
You must activate the fast PLC inputs in the PLC program with W522 bit 2 to
bit 5.
For the TNC to identify with certainty a signal change, the signal duration at
the fast PLC input must last a minimum of 4 ms.
MP4130 Numerical designation for fast PLC input
Input: 0 to 255 [no. of the PLC input]
MP4130.2 Fast PLC input sets marker M4590
MP4130.3 Fast PLC input sets marker M4591
MP4130.4 Fast PLC input sets marker M4592
MP4130.5 Fast PLC input sets marker M4593
MP4131.2-5 Condition for activating fast PLC inputs
Input: 0: Activate at LOW level
1: Activate at HIGH level
Set Reset
W522 Activate the high-speed PLC inputs
Bit 2: Fast PLC input defined in
MP4130.2
Bit 3: Fast PLC input defined in
MP4130.3
Bit 4: Fast PLC input defined in
MP4130.4
Bit 5: Fast PLC input defined in
MP4130.5
PLC PLC
Set Reset
M4590 Status fast PLC input from MP4130.2 NC PLC
M4591 Status fast PLC input from MP4130.3 NC PLC
M4592 Status fast PLC input from MP4130.4 NC PLC
M4593 Status fast PLC input from MP4130.5 NC PLC
Warning
Only the PLC inputs of the LE can be defined as fast PLC inputs, and not
the inputs on a PL 4xxB.