HEIDENHAIN MANUALplus 620 Technical Manual page 1670

8.15.7 LOAD DOUBLE WORD (LD)
8.15.8 ASSIGN (=)
Logic processing
with the ASSIGN
command
1670
Syntax: LD (LOAD DOUBLE WORD)
Operands: M, I, O, T, C
Action:
Copy 32 markers, inputs, outputs, timers or counters with ascending
numbering into the word accumulator. Each operand occupies one bit in the
accumulator. The control saves the given operand address as LSB in the
accumulator, the given address + 1 as LSB + 1 and so on. The last (32nd)
operand becomes the MSB! If necessary, the control fills the accumulator
with the correct algebraic sign.
Example:
See example command LB. Use command LD in the same way as LB.
However, the control processes 32 operands.
Syntax: = (STORE)
Operands: M, I, O, T, C
Action:
Assign the content of the logic accumulator to the addressed operand. Use
the = command only at the end of a sequence of logical gating operations in
order to transfer a gating result to a logic operand. This command can be used
several times in succession (see example).
Example:
Gate the inputs I4 and I5 with AND, and assign the result to outputs O2 and
O5.
Initial state:
Input I4 = 1
Input I5 = 0
Output O2 = ?
Output O5 = ?
Function
Load the operand content
into the logic
accumulator.
Gate the content of the
logic accumulator and
input I5 with AND.
Assign the gating result to
output O2.
Assign the gating result to
output O5.
STL Accumulator
content
L I4 1
A I5 0
= O2 0
= O5 0
HEIDENHAIN Technical Manual MANUALplus 620
Operand content
1
0
0
0