Memory mapping, Field descriptions, Status indicators – Rockwell Automation 1797-OB4D FLEX Ex 24V DC Nonisolated Source 4 Output Module User Manual
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12 FLEX Ex I/O 24V DC 4 Non-Isolated Source Output Module
Publication
1797-5.6 - June 2011
Memory Mapping
Status Indicators
Indicator
Status Description
Yellow
Individual input present
Flashing red
Channel fault
Solid red
Module did not pass power up check
Channel 0 is solid red while power-up check is running
Dec
Bit
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
Oct
Bit
17
16
15
14
13
12
11
10
07
06
05
04
03
02
01
00
Read 0
OVL
3
OVL
2
OVL
1
OVL
0
F3
F2
F1
F0
Write 0
Out
Enb
L
DA
3
DA
2
DA
1
DA
0
FS
3
FS
2
FS
1
FS
0
D3
D2
D1
D0
Configuration 1
RA
Alarm Filter
Ch 0…3
Where:
OVL = Overload alarm for individual channel
F = Fault alarm for individual channel
DA = Detect Alarms, Detection of Output faults (0 = Disable, 1 = Enable)
FS = Fault state (0 is reset and 1 is hold last state)
D = Data, Output data 0 = Off 1 = On
L = Latch alarms (0 = Disable, 1 = Enable)
Out Enb = Output Enable
RA = Reset Alarms (0 = Normal, 1 = Reset)
Field Descriptions
Field
Description
Fault Alarm
0 = No fault
1 = Wire-off fault or overload
100 Hz (10 ms) filter is integrated
Note: A wire-off fault or overload can be detected using this single bit.