Dataline short or disconnected (missing the 24VDC)
Burned interior ¼ Amp fuse – F1
At power up the LINK Fail blinks and if the Dataline is clear (24VDC) for 10 seconds, the LINK fail will stop. If there is a BMS controller on-line that polls the network, the Dataline voltage will be below 20 V – which will not allow the LINK to clear. In this case, after a power outage, the BMS interface shall be disconnected till the LINK fail goes off.
The TLC dataline communications system supports multiple access points – RLINKS. Each RLINK supports global programming, monitoring and control of the distributed Lighting Automation Panels. However, to avoid conflicts, only one unit (the “Master”) can broadcast the time of day. CAUTION: In a multiple RLINK system, the 2nd, 3rd, …th RLINKs must be configured as “slaves” by moving the internal switch setting as described below. The Master RLINK is connected directly to the primary operator’s PC – The PC which will be used to set the system clock.
CAS have used 2 Rlinks in master mode successfully
Changing an RLINK from Master to Slave
1. Remove the two Phillips screws in the rear panel
2. Slide the board assembly out of the housing as a unit
3. Move the slide switch in the front right corner to the “Slave” position
4. Position the board in the extruded rails and slide back into place, while making sure the “ALARM RESET” button clears the front face plate.
A 10-serial, 2-Ethernet port, 1 DH+ port protocol translator gateway enables data transfer between serial, Ethernet and Allen Bradley DH+ protocols. An extensive library of drivers provides easy interoperability between a variety of devices used in process control and building automation industries.
The FieldServer is an Allen Bradley DH+ protocol translator/gateway which enables devices using one protocol to communicate with devices using another protocol. An example is a PLC using one protocol needing to supply alarm information to a DCS using Data Highway Plus. In a single, comprehensive package the FieldServer provides the hardware and software necessary for this translation.
The FS-B4013 DH+ gateway includes eight RS-232 ports, two RS-485 ports, two Ethernet (10BaseT) ports, and one Allen Bradley DH+ port to interface to the devices. All the necessary software and instructions for configuration are supplied with the FieldServer. FieldServer Technologies also offers fee based configuration services. Besides Allen Bradley DH+, FieldServer are available for various fieldbuses.
DH+ cables are often called the Blue Hose because of the blue color of the cable made for this purpose. It’s a twisted pair with a shield. The Drained Shield is used for the ground terminal. DH+ is based on RS485 but it isn’t.
Supported Baud Rate: 115.2K Baud rate
DH+ terminal Specification:
Signal- = Blue = Terminal 1 = Terminal closest to white LED
Shield = Clear = Terminal 2
Signal+ = Clear = Terminal 3
A stretch sensor is a cylindrical cord which can be stretched to achieve varying resistances. It’s a sort of variable resistor where the resistance can be adjusted by the intensity of the stretch. Usually when the sensor is stretched by 50% it reaches double it’s initial resistance.
Explanation of some key terms for VEEDER TLS in-Tank Inventory
Fuel Height Fuel Height is the depth of all liquid in the tank in inches or millimeters.
Water Volume Water Volume is the amount of water in the tank in gallons or liters. Note: If you are using high alcohol probes, Water Volume will not appear in the display or printed reports.
Water Height Water Height is the depth of the water in the tank. Note: If you are using high alcohol probes that cannot detect water, Water Height will not appear on the display or the printed reports.
Fuel Temperature The console displays the fuel temperature in the tank in Fahrenheit (F) pr Centigrade (C) temperature, depending on how your system as set up.
Ullage Ullage is the amount of room left in the tank. Normally, a tank is not totally full to leave room for the product to expand.
Temperature Compensated Volume The product in the tank expands and contracts with temperature. The colder the temperature, the more the product will contract. The higher the temperature, the more the product will expand. Temperature Compensated Volume is at 60 degrees Fahrenheit, unless your system was programmed to use another temperature value.Note: If Temperature Compensated Volume was set to “Disable” using the System Setup function, you will not be able to print the Temperature Compensated Volume on the report.