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8315 L&J Tankway Software Description

TankGate Interface

22 

Installation and Operations Manual

There are two communications tasks - one for each of the communication channels. 

COM ports 0 and1 are used to interface to external devices or host systems. Refer to the 

Hardware Chapter for the location of these ports.

COM0 and COM1

COM 0 and 1 can be configured for communications to Host systems using a variety of 

protocols. For COM 0 and 1 the communication interfaces include the following: 

• 

RS-485 for use in multi-drop configurations or long cable runs (or both)

• 

RS-232 for flexibility in configuring other types of communications links such 

as radio and fiber optic interfaces

• 

RTS/CTS lines are available for hardware handshaking. 

The TankGate is fully compatible with FuelsManager® software. It is also compatible with 

a variety of other Host systems including through Modbus protocol. 

The default communication settings for the COM ports are as follows:

The Data Scanning Task is dedicated to the scanning of field input data from tank 

gauges. The input data is stored in arrays that are subsequently accessed by the Point 

Executive.

The Database Manager is a collection of programs and data. The Database Manager 

allows the TankGate system executive to access data from the database in an organized 

and program-independent manner. It resides in non-volatile RAM.

The Database Manager also contains a Database Dictionary. This dictionary describes 

how the database is organized and also provides information describing how data 

should be presented to the operator. 

After power-up or system reset, a CRC verification of each point in the database is 

performed. If the CRC does not have a match for the point, then it is disabled and a flag 

is set indicating that the point is invalid.

System tasks include the Calendar Task, which manages Time and Date functions. Other 

system tasks include utility routines for checksum calculations, diagnostics, start-up 

and initialization.

COM Port

Protocol

Baud Rate

Data Bits

Parity

Stop Bits

COM0

RTU Slave or 

Modbus - Auto-

sensing

9600

8

N

0

COM1

Modbus

9600

8

N

0