Instruction Manual

CompactBlock Distributed I/O on Remote I/O 23
Publication 1791R-IN001A-EN-P - February 2002
Troubleshoot with the Indicators
The 1791R I/O module has the following indicators:
• Status indicator - base only
• Comm indicator - base only
• I/O status indicators - base and expansion
4B4P with 0B16PX
17 16 15 14 13 12 11 10 7 6 5 4 3 2 1 0
Input
Image
Reserved
In
3
In
2
In
1
In
0
Input
Image
Reserved
Output
Image
EX
O
11
EX
O
10
EX
O
9
EX
O
8
EX
O
7
EX
O
6
EX
O
5
EX
O
4
EX
O
3
EX
O
2
EX
O
1
EX
O
0
O
3
O
2
O
1
O
0
Output
Image
Reserved
EX
O
15
EX
O
14
EX
O
13
EX
O
12
Status Indicator
Indication: Status:
Off No power
Red Hardware or software error, power is low
Green Normal operation
Flashing Red Comm failure 1*
Flashing Red/Orange Expansion error
*1 Comm fail = communication cable disconnected, 100ms between valid
frames, no more than 255 valid frames between valid frames addressed to
module, 20ms idle time exceeded.
**2 COMM and STATUS will alternately flash when processor restart lockout is
selected, a fault has occurred and the processor is communicating with he
module.