Honeywell 900U02-0100 - Page 201

Revision 10 ControlEdge HC900 Process & Safety Controller User and Installation Manual 187
May 2019
Table 28 – LED Indications on Controller CPUs
CPU
model
Figure
101
item
LED
LED State/Color
Description
All models
1
Controller Status
Off
Solid Red
Blinking Yellow
Blinking Red
Solid Green
Blinking Green
Solid Yellow
No power.
Failed
Failed
(Diagnostic Code; refer to Table 29.)
PROGRAM Mode
RUN Mode
OFFLINE Mode/while Flash RAM
programming
All models
2
For legacy systems,
RS-232/RS-485 S1 port
For new systems, RS-
485 S1 port
XMT/RCV
Yellow/Green
Yellow when transmitting, green when
receiving.
All models
3
For legacy systems,
RS-232/RS-485 S2 port
For new systems, RS-
485 S2 port
XMT/RCV
Yellow/Green
Yellow when transmitting, green when
receiving.
All models
4
5
E1 port
Upper LED
Lower LED
Yellow (On/Off)
Green (On/Off/Flash)
On for 100Base-T, Off for 10Base-T
On for connection, Off for no
connection, Flash for activity
C70
C75
6
7
E2 port
Upper LED
Lower LED
Yellow (On/Off)
Green (On/Off/Flash)
On for 100Base-T, Off for 10Base-T
On for connection, Off for no
connection, Flash for activity
C50
C70
C75
8
9
I/O port
Upper LED
Lower LED
Yellow (On/Off)
Green (On/Off/Flash)
On for 100Base-T, Off for 10Base-T
On for connection, Off for no
connection, Flash for activity
Controller Status LED Diagnostic indicators
When the Controller has a flashing amber status LED after power-up a critical, power-on-self-test, error
has occurred that requires controller module replacement. When the Controller Status LED (Figure 101
on page 180, item 1) is flashing red, consult