Redundant I/O Block - ABB Symphony Harmony Series Instruction

Default States
Failure States
WBPEEUI240751C0
TE R M IN ATIO N BA S E FO R
R E DU NDAN T I/O M O D ULE S
Figure 3-15. Redundant I/O Block
Default states for outputs are selected during function code
configuration. The outputs will automatically return to normal
operation after communication has been restored. For an ana-
log output, the default state is either zero percent output, 100
percent output, or hold the current output. For a digital out-
put, the default state is either zero state output, one state out-
put, or hold the current output. Refer to
Section 6 for information about default state specifications.
Failure states for outputs are by default their unpowered or off
states. A nonredundant output channel will enter its failure
state when:
All power to the I/O module is lost.
•
Machine fault timer error occurs (refer to
•
Timer Timer in this section).
Timer Timer
TW O ID E N TIC AL
I/O M O D U LE S
R E D U N DAN T
I/O BLO CK
Function Codes Function Codes Function Codes Function Codes
Machine Fault Machine Fault
Machine Fault Machine Fault
I/O Block
T 00816C
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