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MERLIN NX ROOM CONTROLLER – INSTALLATION & COMMISSIONING INSTRUCTIONS
OPERATOR INTERFACES
LEDs
The controller features the following LEDs:
T2 R2 T1 R1
Fig. 22. Controller LEDs
Table 7. Description of LED behaviors
symbol
color
T2
yellow
Not used
R2
yellow
Not used
LED indicating transmission of communication
T1
yellow
signals via the BACnet MS/TP interface.
LED indicating reception of communication
R1
yellow
signals via the BACnet MS/TP interface.
Status LED indicating firmware problems,
yellow
!
hardware problems, etc. (see Table 8).
Power LED indicating firmware problems,
green
hardware problems, etc. (see Table 8).
Table 8. Status LED and power LED behaviors
Status LED
#
Mode
(yellow)
1
Power failure
Stays OFF
2
Device error*
Stays ON
3
Firmware download
ON/OFF (1 Hz)
4
No application
ON/OFF (0.25 Hz) ON/OFF (0.5 Hz)
5
Broken sensor
Stays ON
6
Short-circuiting
Stays ON
7
Auto-MAC
ON/OFF (0.5 Hz)
Unacknowledged
8
ON/OFF (2 Hz)
alarm
9
Normal operation
Stays OFF
Modbus communi-
10
Stays ON
cation failure
*Please return the controller for repair.
The ON/OFF frequencies listed in Table 8 can be converted
from "Hz" (i.e., "ON/OFF per second") to "ON/OFF per
minute" by multiplying them by 60.
!
function, description
!
Power LED
(green)
Stays OFF
Stays ON
ON/OFF (1 Hz)
ON/OFF (0.25 Hz)
ON/OFF (0.5 Hz)
ON/OFF (1 Hz)
ON/OFF (2 Hz)
ON/OFF (0.5 Hz)
ON/OFF (1 Hz)
Service Button
The Service Button is used to trigger dedicated events.
It is important to distinguish different controller behaviors
which are elicited depending upon whether the controller is
powering up or in normal operation when the Service Button
is pressed. See the following sub-sections.
Pressing Service Button during Power-Up
During controller power-up, pressing the Service Button until
LED behavior #3 (see Table 8) is displayed will reset the
controller to its factory settings, which are as follows:
▪
The application is cleared from the controller.
▪
The MAC address will be set to 0xFF, meaning that the
controller will now look for a new mac address (Auto MAC
will be automatically triggered after controller power-up).
▪
The maxMaster setting will revert to its default value of 35.
▪
The Max info frames will revert to 10.
▪
The device instance will revert to its default of 4194302.
▪
The device name will revert to CLME[ModelName].
▪
The values of automac min_mac and max_mac will be
reset to 1 and maxMaster, respectively.
Pressing Service Button during Normal Operation
During normal operation of the controller, a short press (< 1
sec) of the Service Button will cause a Service Pin Message
(BACnet WhoAmI as a Private Transfer (SerialNo. = 130)) to
be sent.
17
EN1Z-1035GE51 R0420
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