Rockwell Automation 1791-16A0 16 INPUT AC BLOCK - Manual (Page 10)

Installation Instructions
Block I/O
Cat. No. 1791-16A0 Series B
10
Indicators
INPUT INPUT
00
01
02
03
04
05
06
07
10
11
12
13
14
15
16
17
COMM
STATUS
INPUT INPUT
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
COMM
STATUS
PLC SLC
12394–I
Indicator Description
COMM OFF
ON
Flashing Communications not established
Communication established
Processor in Program mode
STATUS OFF
ON
Flashing Normal
Error (hardware or software), block power low
COMM FAIL – Communication cable off, 100ms between valid frames, no more
than 255 valid frames between valid frames addressed to block, 20ms idle time
exceeded.
COMM and STATUS will alternately flash when processor restart lockout is selected, a fault has occurred and the processor
is communicating with the block.
Fusing
The block I/O module is internally fused to protect the module. No external
power fusing is required.