Result
After correct and error-free processing the system program sets the
RLO to ’0’.
Calling OB 142 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
Possible errors
If an error occurs, the system program sets the RLO to ’1’.
The errors listed in the following table can occur. If an error occurs,
the system program enters the error ID listed below in ACCU-1-L.
ID Meaning
8E01H
8E02H
8EFFH
Illegal function no. in ACCU-2-L
1)
One of the reserved bits (no. 4 to 15) in
ACCU 1 is ’1’
1)
Incorrect mode (e.g. when the delayed interrupt is to
be disabled and DX 0 contains the parameter
"process interrupts via IB 0 = on")
1)
the incorrect value is located in ACCU-2-L
Scan control word
The status of the control word can be scanned with the following
program sequence:
1. load function no. ’2’ or ’3’ in ACCU-2-L,
2. load value ’0’ in ACCU 1,
3. call OB 142,
4. read out ACCU 1.
Table 6-10 Error IDs of OB 142 in ACCU-1-L
OB 142: "Delay All Interrupts" On/Off
CPU 948 Programming Guide
6 - 34 C79000-G8576-C848-04
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