Rockwell Automation Publication 1769-IN088A-EN-P - February 2011 141
I/O Memory Mapping Chapter 3
Channel Configuration Words
The bits are defined as follows:
• E = Channel Enable: (0 = Disabled, 1 = output Enabled, process changes)
• Reserved = Set to zero
• SIU = System interrupt low clamp, under-range alarms: (0 = Disabled,
1 = Enabled)
• SIO = System interrupt high clamp, over-range alarms: (0 = Disabled,
1 = Enabled)
• LA = Latch low/high clamp, under/over-range alarms: (0 = Disabled,
1=Enabled)
• ER = Enable ramping: (0 = Disabled, 1 = Enabled. Ramp rate limited by
fault states.)
• FM = Fault mode: (0 = Hold Last State, 1 = User Defined Value)
• PM = Program mode: (0 = Hold Last State, 1 = User Defined Value)
• HI = Hold for initialization: (0 = Disabled, 1 = Enabled)
• PFE = Program/idle to fault enable: (0 = Disabled, 1 Enabled)
The first two words of each eight word group in the configuration file allow you
to change the parameters of each channel independently. For example, words 8
and 9 correspond to channel 1 while words 16 and 17 correspond to channel 3.
Word
Bit Position
1514131211109876543210
0 E Reserved SIU SIO LA ER FM PM HI PFE
1 Reserved Output Data
Format Select
Reserved Output Type/
Range
Define Indicate this These bit settings
1514131211109876543210
Program (Idle)
to Fault
Enable
Program (Idle)
Mode Data
Applied
(1)
0
Fault Mode
Data
Applied
(1)
1
Hold for
Initialization
Disabled
0
Enabled 1
Program (Idle)
Mode
Hold Last
State
(1)
0
User-Defined
Value
(1)
1
Fault Mode Hold Last
State
(1)
0
User-Defined
Fault Value
(1)
1
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