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Faulty operating condition:
If the GPS receiver is not able to establish contact with the satellites, the TSU-25 will see that
the attempt to download accurate time information failed.
When the next sync period expires, the Status-LED will start flashing together with the Sync-
LED. The Status-LED will stop flashing when the satellite contact is established again.
If for some reason the contact cannot be restored, or the TSU-25 is unable to update the
software clock on the RTU-30t the time information sent will drift (note! worst case) +/-7 sec
every 24-hour period.
ComTroll 230S
ComTroll 230S is a gateway that resides on the ComTroll Network and connects to Modbus
devices over EIA-232 or EIA-485. The controller module RTU-30s supports up to 14 Modbus
devices on a multi-drop EIA-485 network.
The RTU-30s can be installed in a ComTroll 230 rack where other RTU-30 versions (RTU-
30/RTU-30i/RTU-30t) are installed, and support all media available in the ComTroll Network
System.
SERVICE
RESET
TX
RX
SERVICE
NORTROLL AS
RTU-30s
CRU-200
COMMUNICATION
MODULE
SLC-200+
POWER MODULE
NORTROLL AS
NORTROLL AS
MODBUS
DEVICE
#1
MODBUS
DEVICE
#2
MODBUS
DEVICE
#247
Installing Modbus devices
For details about installation of Modbus devices, please contact NORTROLL AS.
