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7.2.5 Fast PLC Inputs
December 2001
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
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
M4590
Status fast PLC input from MP4130.2 NC
M4591
Status fast PLC input from MP4130.3 NC
M4592
Status fast PLC input from MP4130.4 NC
M4593
Status fast PLC input from MP4130.5 NC
Warning
Only the PLC inputs of the LE can be defined as fast PLC inputs, and not
the inputs on a PL 4xxB.
Operands
Set
Reset
PLC
PLC
Set
Reset
PLC
PLC
PLC
PLC
7 – 21
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