6 call module if logic accumulator = 0 (cmf) – HEIDENHAIN TNC 407 (243 020) Technical Manual User Manual
Page 569
3.12.6 Call Module if Logic Accumulator = 0 (CMF)
Abbreviation for PLC Editor:
CMF (CALL MODULE IF FALSE)
Jump processed
Jump not processed
Execution time [µs]
1.5 to 2.5
0.1 to 0.5
Number of bytes
26 (24)
Special Library Call:
Execution time [µs]
2.0 to 2.4
0.4 to 0.5
Number of bytes
28
Byte information in brackets:
A shorter command is employed in certain high-priority program sequences.
Operands: jump address (LBL)
Operation:
A CMF command is a conditional Call Module. If the Logic Accumulator is "0", the Module with the
specified jump address (Label) is processed. If the Logic Accumulator is "1", the main program
continues without a Call Module. This command interrupts a logic sequence.
Example for the commands CM, CMT, CMF
A certain Module is to be called, depending on Input I5.
Initial state:
Input I5 = 0
Line
Instruction
Accumulator Contents
Operand Contents
Bit
31
.
.
.
7
0
... x x x x x x X x x x x x x x
1
L I5
... x x x x x x 0 x x x x x x x
0
2
CMF 10
... x x x x x x 0 x x x x x x x
3
L M100
... x x x x x x 1 x x x x x x x
1
•
•
•
499
EM
500
LBL 10
501
L I3
... x x x x x x 0 x x x x x x x
0
502
OM 500
... x x x x x x 1 x x x x x x x
1
503
= O20
... x x x x x x 1 x x x x x x x
1
504
EM