2. ACCUs
2a)
ACCU-2-L
Function no.,
Permitted values: 1, 2 or 3 where:
1: The contents of ACCU 1 are loaded in the
control word.
2: All the bits marked ’1’ in the mask in
ACCU 1 are set to ’1’ in the control word.
The new control word is loaded in ACCU 1
3: All the bits marked ’1’ in the mask in
ACCU 1 are set to ’0’ in the control word.
The new control word is loaded in ACCU 1
2b)
ACCU 1
New control word or mask depending on the required function.
Result
After correct and error-free processing the system program sets the
RLO to ’0’.
Calling OB 143 has the following results:
Funct. no.
in ACCU-2-L
Contents of ACCU 1
before after
1
2
3
control word
mask
mask
control word
new
control word
new
control word
OB 143: "Delay Single Cyclic Timed Interrupts" On/Off
CPU 948 Programming Guide
6 - 36 C79000-G8576-C848-04
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