Graco 26C266 Manual page 22

Troubleshooting
LED 1
No LED 1
22
LED 2
Flashing red Node: No radio communication
There are two settings on every node device used to synchronize to the
gateway device:
• The node must be bound to the gateway.
• Each node ID with that network must be set to a unique number.
Solutions:
1. If the Gateway and Node are less than two meters apart, device
communication may fail (radios may saturate). If the Gateway is less
than two meters from another Gateway, send and receive
transmissions between all devices the Gateways communicate with
fails.
2. The Gateway and Node may be too far apart to achieve
synchronization – consult the factory for options.
3. Use a qualified antenna on both the Gateway and Node devices.
4. After any system parameter change, cycle the power to
re-synchronize all devices.
5. When a Node loses synchronization, it is programmed to attempt
resynchronization for five seconds, then sleep for fifteen seconds.
Synchronizing may require up to twenty seconds.
6. Re-cycle power on the Gateway and Node devices.
Not blinking Gateway: No Modbus communication
amber
Solution:
1. The gateway's LED 2 should always be blinking amber to indicate
Modbus communication. If LED 2 does not blink amber, verify the
baud rates, slave IDs, parity, and stop bits are set correctly.
2. Check the cables connecting the gateway to the host device.
No LED 2 All devices display "POWER" on the LCD for the first five to ten seconds
after applying power. A gateway always has a green LED 1 on when the
power is connected. Nodes flash a red LED 2 every three seconds, or a
green LED 1 every second, depending on the RF Link status.
If no LEDs are lighting up:
1. Put battery-powered devices into power-down mode by pressing and
holding button 1 for three to five seconds. To return from power-down
mode, press and hold button 1 for three to five seconds.
2. Recheck the powe connections and power requirements.
Battery-powered devices require 3.6 - 5.5 VDC. Non-battery powered
devices require 10 - 30 VDC.
3. After replacing the battery, allow up to sixty seconds for the device to
power up.
4. The gateway cannot be attached to another Modbus master device or
a Modbus slave ID 1 via RS-485. Special configuration using the Web
page configuration tool allows the gateway to become a slave unit
when necessary.
Definition/Solution
3A6715B