QTech Data Systems DNP3 RTU - Manual (Page 14)

DATRAN XL4 RTU – Owners Manual – v1.1 June 2012
www.qtech.co.nz Page 14
System Status LEDs System Status LEDs System Status LEDs System Status LEDs
There are 8 System Status LED’s on the front panel of the DATRAN XL4 RTU.
The LEDs indicate the following status information:
ON
This blue LED indicates that power is applied to the XL4 RTU. If power is connected and the LED
is not on this could indicate that the supply voltage is low or that the Q22 fuse has blown
OK
This green LED flashes at a slow regular interval to indicate that the Q04 Processor is running.
The LED will flash 6 times rapidly whenever a system reset occurs. System resets occur at
system power up or if the watch dog timer times out.
IP
This yellow LED flashes on for approximately 0.5 seconds every time a valid communications
packet is received for this module address from another module on the RS485 bus.
MU
This yellow LED turns on when the mute gate in the radio connected to the RS232-B port opens
showing the radio channel is busy. The module will not transmit data when MU (mute) LED is on.
Rx This yellow LED turns on whenever a valid data carrier is detected from the RS232-B port.
KY
This yellow LED turns on whenever the modem attached radio’s transmitter on the RS232-B port
is requested to be turned on.
TX This yellow LED turns on whenever the RTU is transmitting data from the RS232-B port.
ER
This red LED is used to indicate if any of the seven error conditions are present. The LED will
blink a certain number of times corresponding to that error condition. The LED pulses are
separated by a 2 second period allowing multiple error codes to be indicated.
Error Codes Error Codes Error Codes Error Codes
The following is a list of the number of error light flashes for each of the error/fault codes:
1. Main battery failure
2. Clock battery low
3. Communications with Base Station has failed.
4. RS485 Bus communications failure
5. One or more real digital outputs have failed.
6. One or more analog input is out of range
7. The DLP is not loaded or is corrupted.
Digital Inputs Digital Inputs Digital Inputs Digital Inputs
The DATRAN XL4 has 8 digital input channels labelled 1 through 8 and a ground connection labelled ‘G’. The state
of each digital input is indicated with a corresponding green status LED.
To turn ON a digital input channel, the external device must ground the appropriate terminal.
To turn OFF a digital input channel, the external device must open circuit the appropriate terminal or hold it
at the supply voltage.
Note. The input voltage on any digital input channel should not be allowed to go above the power supply voltage.
The digital input channels can be connected to a range of devices including relays, mechanical switches, solid-
state switches, or transistors.
The digital input channels are sampled by the Q04 Processor each 100ms. This implies that the state of a given
digital input channel must be constant for at least 100ms for the state to be detected. However, digital input