Technical data

Result Calling OB 122 has the following results:
Function 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
Possible errors
•• Illegal function number in ACCU-2-L
•• One of the reserved bits in ACCU 1 (no. 4 to 31) is set to "1".
In the event of error,
OB 31 (other runtime errors) is called. If OB 31
is not loaded, the CPU goes to the STOP mode.
In both cases, the error ID
1A48H is entered in ACCU-1-L.
Notes
•• You can scan the status of the control work with the following
program sequence:
1. Load the function number 2 or 3 in ACCU-2-L
2. Load the value "0" in ACCU 1
3. Call special function OB 122
4. Read out ACCU 1
•• You can determine the status of interrupt processing by reading
out system data word RS 132.
- RS 132 Condition code word "delay all interrupts"
OB 122: Enable/Disable "Delay of All Interrupts"
CPU 928B Programming Guide
6 - 24 C79000-B8576-C898-01