Channel configuration words – Rockwell Automation 1769-XXXX Compact I/O Modules User Manual
Page 141
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.
Wo
rd
Bit Position
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
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
15 14 13 12 11 10 9
8
7
6
5
4
3
2
1
0
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