Honeywell 7800 Product Data page 6

7800 SERIES S7810B MULTI-DROP SWITCH MODULE
Pattern in Seconds
0.1
1.5
0.8
0.8
1.6
1.3
ON
OR
OFF
65-0228—3
Fig. 3. Explanation of MODE LED light patterns.
OFF LINE: The S7810B is not receiving any messages from the QS7800B
ControlBus™ Module.
LED is off for 1.5 seconds and on for 0.1 second.
Check for:
• Wiring problems on multi-drop bus (loose connections, broken wires, or
• QS7800B ControlBus™ Module or S7810B Multi-drop Switch Module
M13028
• QS7800B ControlBus™ Module not properly seated in Q7700 Network
• No power to Q7700 Network Interface Unit.
SENSING: The S7810B is receiving messages from the QS7800B
ControlBus™ Module.
LED is off for 0.8 second and then on for 0.8 second.
The SENSING pattern reverts to the OFF LINE pattern when it has not
received a message from the QS7800B ControlBus™ Module for more
M13029
than four seconds.
ALARM LISTEN: The S7810B monitors devices on the local bus and
notes any alarm condition.
(RETURNING TO
EITHER SENSING
LED is on for 1.6 seconds then reverts to the SENSING or switch closed
OR SWITCH
pattern.
CLOSED PATTERN)
M13030A
SWITCH CLOSED: The S7810B multi-drop bus port switch has been
0.1
switched on by the QS7800B ControlBus™ Module and data from the
local bus is being sent to the multi-drop bus.
0.8
LED is off for 0.1 second and on for 0.1 second, repeating for the 1.6
seconds duration.
M13031
FAULT: The S7810B has an internal fault.
0.1
LED is off for 1.3 seconds, on for 0.1 second, off for 0.1 second, on for 0.1
second. (Pattern is mainly off with two short blinks.)
M13032
STEADY STATE CONDITIONS:
LED is always OFF. S7810B is either defective or no power has been
applied to it.
LED is always ON. S7810B is defective.
M13033
miswired connections.
not connected to multi-drop bus.
Interface Unit slot.
6
Description