Technical data

The bits of the control word are assigned as follows:
Bit no. Interrupt
0 to 2 Reserved; these bits must be "0"!
3 = ’1’
4 = ‘1‘
5 = ’1’
6 = ’1’
7 = ’1’
8 = ’1’
9 = ’1’
10 = ’1’
11 = ’1’
Time-driven interrupt with fixed time
intervals:
10 ms (OB 10)
20 ms (OB 11)
50 ms (OB 12)
100 ms (OB 13)
200 ms (OB 14)
500 ms (OB 15)
1 sec (OB 16)
2 sec (OB 17)
5 sec (OB 18)
12 to 15 Reserved; these bits must be "0"!
2. Accus
2a) ACCU-2-L
Function No.
Permissible values: 1, 2 or 3 with:
1: The contents of ACCU 1 are loaded
in the control word.
2: All the bits in the mask in ACCU 1
marked with a ’1’ are set to
’1’ in
the control word. The new control word
is loaded in ACCU 1.
3: All the bits in the mask in ACCU 1
marked with ’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 desired function
OB 121: Enable/Disable Individual Time-Driven Interrupts
CPU 928B Programming Guide
6 - 20 C79000-B8576-C898-01