2.11 Status LEDs
2.11.1 Power-up
All LEDs are OFF.
2.11.2 Initialization
After power is applied or reset switch pushed, LED 1 is ON for about 15 seconds, then LEDs 2, 3, 4, 5, 6, R1, R2,
IN1, IN2, IN3, IN4, IN5, IN6, IN7 and IN8 are flashed once at the beginning of initialization. LEDs 3 and 4 is
turned ON for approximately 1 second after the hardware initialization has completed, then the application
code is initialized. The amount of time the application takes to initialize depends on the size of the database,
about 1 second without a card database. Each 10,000 cards will add about 2 seconds to the application
initialization. When LEDs 1, 2, 3 and 4 flash at the same time, data is being read from or written to flash
memory, do not cycle power when in this state. If the sequence stops or repeats, perform the bulk erase
procedure, see
Bulk erase configuration memory
.
2.11.3 Running
After initialization is complete, the LEDs have the following meanings:
LED
Description
1
Off-line / On-line and battery status
Off-line = 20% ON, On-line = 80% ON
Double flash if battery is low
2
Host communication activity (Ethernet or Micro USB port)
3
Internal SIO communication activity
4
External SIO communication activity
5
Unassigned
R1
Reader 1:
Clock/Data or D1/D0 mode: Flashes when data is received, either input
F/2F mode: Flashes when data/acknowledgment is received
RS-485 mode: Flashes when transmitting data
R2
Reader 2:
Clock/Data or D1/D0 mode: Flashes when data is received, either input
F/2F mode: Flashes when data/acknowledgment is received
RS-485 mode = Flashes when transmitting data
D16
Flashes with Ethernet traffic
YEL
Ethernet speed: OFF = 10Mb/S, ON = 100Mb/S
GRN
OFF = No link, ON = Good link, Flashing = Ethernet activity
IN1
Input IN1 status: OFF = Inactive, ON = Active, Flash = Fault.
1
IN2
Input IN2 status: OFF = Inactive, ON = Active, Flash = Fault.
1
IN3
Input IN3 status: OFF = Inactive, ON = Active, Flash = Fault.
1
IN4
Input IN4 status: OFF = Inactive, ON = Active, Flash = Fault.
1
IN5
Input IN5 status: OFF = Inactive, ON = Active, Flash = Fault.
1
IN6
Input IN6 status: OFF = Inactive, ON = Active, Flash = Fault.
1
PLT-05244, A.3
16
June 2021
Powering
Trusted Identities
HID Mercury™ LP1502 Controller
Installation and Specifications
