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Parameters for DX 0
Updating the timers
Level priorities
7 - 10
• • As standard, the timers T 0 to T 255 are updated.
• • If you enter the value "0" in DX 0, no timers are updated, even if
they are included in the program. There is then also no error
message output.
• • Updating is as follows:
Entry
'0'
Updating
none
You can specify different priorities for the program execution levels.
This is achieved either using the default or by specifying DX 0
parameters.
Priorities when "process interrupts via IB 0 = on" is selected
(PROCESS INTERRUPTS level)
These priorities have the following default values in DX 0:
• • timed interrupts:
• • Process interrupts
via input byte IB 0:
You can swap over the priorities in DX 0.
Priorities when "process interrupts via IB 0 = off" is selected
(= processing of system interrupts level INTERRUPTS)
In this mode, the following default priorities are set:
• • timed interrupts:
• • system interrupts:level priority 2 (lower priority)
'1'
'2'
'3'
T0 to
T0 to
T0 to
T1
T2
T3
level priority 1 (higher priority)
level priority 2 (lower priority)
level priority 1 (higher priority)
CPU 948 Programming Guide
C79000-G8576-C848-04
'4'
....
T0 to
....
T4
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