Table 28 - Led Indications On Scanner Module; Table 29 - Scanner Led Diagnostics - Honeywell HC900 User And Installation Manual

Figure 80
item
1 Scanner Status
2
3
Scanner Diagnostic LED Indication
The scanner uses its LED to communicate diagnostic information. These diagnostics are a subset of the main CPU's
and are listed below.
Number Possible Cause
of
Strobes
1
RAM or ROM failed diagnostics on
power-up.
Revision 6
21 April 2017
Table 28 – LED Indications on Scanner Module
LED
10/100 Base-T port
XMT (upper LED)
LINK (lower LED)
Table 29 – Scanner LED Diagnostics
Scanner Action
Executes an infinite loop that toggles the LED.
Communications and module scanning are
disabled. Module outputs are in the power-off
state -- DO outputs are off, and AO outputs
are at zero milliamps.
HC900 Process & Safety Controller User and Installation Manual
LED State/Color
Off No power
Solid Red Failed
Blinking Red (Diagnostic Code; refer to Table 29 -
Scanner LED Diagnostics.)
Solid Green Startup Mode
Blinking Green Scan Mode
Green (On/Off)
Green (On/Off) On while a message is being sent from
the Main CPU; otherwise Off.
On while the Main CPU is receiving a
message. Remains On as long as
host is present; Off when the host is
removed from the link.
NOTE: These LEDs indicate activity on the communication
port, they are controlled by hardware (PHY chip), not by
software.
Description
User Action
1. Cycle power
2. Replace scanner
3. Replace rack
4. Check grounding
5. Ensure system is properly
isolated from noise
183