FTS 371 SMART USER MANUAL
Flash Technology, LLC
Revision 4 – 9/7/2021
18
GPS Configuration and Test Instructions:
1.
Configure the GPS PCB:
a.
For synchronization with Flash Technology products, do not install the jumper on H1 or H2.
Or install the jumper on one pin only.
b.
For synchronization with Orga products, install the jumper on H1 (covering both pins).
c.
For synchronization with Unimar products, install the jumper on H2 (covering both pins).
2.
Apply power to the FTS 371 Controller.
3.
View the LEDs on the GPS board to determine operational status.
LED Indicator
LED Description
POWER
Lit (green) if GPS board is powered
SYNC
Lit (green) when GPS Sync is achieved. May take up to 10 minutes after
power up. If not lit, check that antenna has an unobstructed view of the sky.
OPEN
Lit (red) indicates cable or antenna not connected or damaged.
SHORT
Lit (red) indicates cable or antenna is shorted and defective.
RS-485 MODBUS RTU COMMUNICATION
Advanced monitoring of the FTS 371 SMART controller is available by RS-485 Modbus RTU communication
interface available at connector J6. The FTS 371 SMART system controllers are configured to be a Modbus
secondary device. The controller includes a rotary switch on the bottom right to accommodate multiple FTS 371
SMART systems to be monitored through Modbus. This rotary switch specifies the Modbus secondary address with
values 1 through 10 (switch positions 1 to 9 address as 1 to 9 and switch position 0 addresses as 10). When
multiple FTS 371 controllers are used, they must be addressed and monitored individually. Data is not collated
from secondary units to the primary.
