Siemens SPC3 Hardware Description page 26

PROFIBUS Interface Center
The other interrupt controller registers are assigned in the bit positions, like the IRR.
Address Register
02H / Interrupt Register
03H (IR)
04H / Interrupt Mask
05H Register
(IMR)
02H / Interrupt
03H Acknowledge
Register
(IAR)
Figure 5.5: Additional Interrupt Registers
The 'New_Prm_Data', 'New_Cfg_Data' inputs may not be deleted via the Interrupt Acknowledge Register.
The relevant state machines delete these inputs through the user acknowledgements (for example,
'User_Prm_Data_Okay' etc.).
Page 24
2003/04
Reset State
Readable All bits deleted
only
Writable, can All bits set
be changed
during
operation
Writable, can All bits deleted
be changed
during
operation
V1.3
SPC3
Assignment
Bit = Mask is set and the interrupt
1 is disabled.
Mask is deleted and the
Bit = interrupt is enabled.
0
Bit = The IRR bit is deleted.
1 The IRR bit remains
Bit = unchanged.
0
SPC3 Hardware Description
Copyright (C) Siemens AG 2003. All rights reserved.