Varec Optional Interfaces, 10.1 4000TIFMO, 10.2 4000GEFMO, 10.3 4000LJFMO, 10.4 4000MXFMO

4000 Optional Interfaces

10 Optional Interfaces

Our intent with these optional interfaces is enabling the ATT to coexist along side older VAREC style and competitor gauging systems and transmitters. This allows the user upward migration to modern gauging systems such as the RS- 485 signal interface utilizing the MODBUS register set protocol. When ready to migrate to modern systems, a simple exchange of the ATT communications module is required.

10.14000TIFMO

This option is compatible along side TIWAY™ transmitters. Although the ATT can coexist along side all of the TYWAY™ transmitters, the communication option is restricted to the HDLC Link Level Protocol, utilizing IT111 primitives. The ATT is also compatible "user selectable" with an earlier version of the TYWAY™ protocol "CIM".

The ATT has user selectable configuration jumpers to apply 120-ohm termination in case maximum baud rates and wiring distances are implemented.

This ATT option is compatible to utilize the companion products Model 4040 Tank side Display and the Model 4050, 4 channel Digital Input and outputs.

10.24000GEFMO

This option is compatible along side GSI / L&J transmitters. Although the ATT can coexist along side any current loop mode transmitters, the communication option is restricted to the GPE Level Protocol format. This format utilizes what we refer to as short and long data responses regarding level, temperature, and status. Because of the nature of this protocol the temperature range of the RTD is limited to -200ºC to +200º C.

10.34000LJFMO

This option can co-exist with L&J Tankway™ Host gauging system and `transmitters. Basically it is a signal format similar to RS-232, however signal voltage levels are in the 0 to 35 VDC range. Basic user selectable baud rate, stop and parity bits. Transmitter address is selectable between 1 and 127; protocol is simple in nature of 2 bytes up and 2 bytes back. Response data consist of product level and temperature, encoder gray code and 2 status bits for error checking and data validity.

10.44000MXFMO

This option can co-exist along side VAREC style matrix transmitters. As implied a transmitter is selected actively by either the 48-volt or the common line in the matrix. When selected 3 milliseconds later the transmitter sends the level data over the Mark Space data lines. This is refereed to as hard wire logic, which occurs only once when selected, it is as if the transmitter is asleep only to wake up send data and go back to sleep. There are no communications parameters to select because only 1 transmitter can be triggered in the matrix at one given time.

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