Honeywell HC900 User Manual

Diagnostics and Troubleshooting - Scanner indicators
Revision 19 HC900 Process Controller Installation and User Guide 171
06/14
Scanner indicators
Figure 86 – LED Indicators on Scanners—1 port (left), 2 port (right) (See Table 28)
Table 28 – LED Indications on Scanner Module
Figure 80
item
LED LED State/Color Description
1 Scanner Status Off
Solid Red
Blinking Red
Solid Green
Blinking Green
No power
Failed
(Diagnostic Code; refer to Table 29 -
Scanner LED Diagnostics.)
Startup Mode
Scan Mode
2
3
10Base-T port
XMT (upper LED)
LINK (lower LED)
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.

Honeywell HC900 Specifications

General

Series	HC900
Redundancy	Optional
Programming Language	Function Block Diagram, Ladder Logic, Structured Text
Inputs	Analog, Digital
Outputs	Analog, Digital, Relay
Display	Optional
Control	PID, Advanced Control
Power Supply	24V DC or 100-240V AC
Storage Temperature	-40°C to 85°C
Humidity	5% to 95% non-condensing
Communication Protocols	Modbus, Ethernet